Piwik error please Help

Hi,
can anybody please tell me what I should do to get my piwik working again?
thanks, here is what is says to me

Declaration of Piwik_Event_Notification::increaseNotificationCount() should be compatible with that of Event_Notification::increaseNotificationCount()
in ‘/customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/core/PluginsManager.php’ at the line 509

#0 Piwik_ErrorHandler(2048, Declaration of Piwik_Event_Notification::increaseNotificationCount() should be compatible with that of Event_Notification::increaseNotificationCount(), /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/core/PluginsManager.php, 509, Array ([GLOBALS] => Array ( RECURSION,[_ENV] => Array ([PATH] => /bin:/usr/bin:/usr/local/bin,[FCGI_ROLE] => RESPONDER,[DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[DOMAIN_NAME] => arthomobiles.fr,[HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,;q=0.7,[HTTP_ACCEPT_ENCODING] => gzip,deflate,[HTTP_ACCEPT_LANGUAGE] => fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3,[HTTP_CONNECTION] => keep-alive,[HTTP_COOKIE] => piwik_visitor1=1%3DNGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk%3D%3A2%3DMTI0NjEwMzI5NA%3D%3D%3A3%3DMTI0NjEwMzI5NA%3D%3D%3A4%3DNTk5NzE%3D%3A5%3DMw%3D%3D%3A11%3DMQ%3D%3D%3A8%3DMw%3D%3D%3A9%3Dd3d3Lmdvb2dsZS5mcg%3D%3D%3A10%3D%3A6%3DMzg2Nzk%3D%3A7%3DMTI0MjIzNjczMQ%3D%3D; piwik_auth=login%3DYWRtaW4%3D%3Atoken_auth%3DYWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM%3D; __utma=263092572.2480445332142907400.1245865536.1245954231.1246103288.3; __utmz=263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none),[H
TTP_HOST] => arthomobiles.fr,[HTTP_KEEP_ALIVE] => 300,[HTTP_USER_AGENT] => Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11,[REDIRECT_DOMAIN_NAME] => arthomobiles.fr,[REDIRECT_QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REDIRECT_SCRIPT_URI] => http://arthomobiles.fr/piwik/index.php[/url],[REDIRECT_SCRIPT_URL] => /piwik/index.php,[REDIRECT_STATUS] => 200,[REDIRECT_UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[REDIRECT_URL] => /piwik/index.php,[REDIRECT_WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[REDIRECT_WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[REMOTE_ADDR] => 88.162.78.247,[REMOTE_PORT] => 49347,[SCRIPT_FILENAME] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[SCRIPT_URI] => [url=http://arthomobiles.fr/piwik/index.php]http://arthomobiles.fr/piwik/index.php,[SCRIPT_URL] => /piwik/index.php,[SERVER_ADDR] => 195.47.247.128,[SERVER_ADMIN] => support@one.com,[SERVER_NAME] => arthomobiles.fr,[SERVER_PORT] => 80,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REQUEST_URI] => /piwik/index.php?module=CoreHome&action=index&idSite=1&period=day&date=today,[SCRIPT_NAME] => /piwik/index.php,[ORIG_SCRIPT_FILENAME] => /usr/lib/apache/suexec-allowed-bins/genericphpwrapper,[ORIG_PATH_INFO] => /piwik/index.php,[ORIG_PATH_TRANSLATED] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[ORIG_SCRIPT_NAME] => /php-bin),[HTTP_ENV_VARS] => Array ([PATH] => /bin:/usr/bin:/usr/local/bin,[FCGI_ROLE] => RESPONDER,[DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[DOMAIN_NAME] => arthomobiles.fr,[HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,
/;q=0.8,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,;q=0.7,[HTTP_ACCEPT_ENCODING] => gzip,deflate,[HTTP_ACCEPT_LANGUAGE] => fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3,[HTTP_CONNECTION] => keep-alive,[HTTP_COOKIE] => piwik_visitor1=1%3DNGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk%3D%3A2%3DMTI0NjEwMzI5NA%3D%3D%3A3%3DMTI0NjEwMzI5NA%3D%3D%3A4%3DNTk5NzE%3D%3A5%3DMw%3D%3D%3A11%3DMQ%3D%3D%3A8%3DMw%3D%3D%3A9%3Dd3d3Lmdvb2dsZS5mcg%3D%3D%3A10%3D%3A6%3DMzg2Nzk%3D%3A7%3DMTI0MjIzNjczMQ%3D%3D; piwik_auth=login%3DYWRtaW4%3D%3Atoken_auth%3DYWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM%3D; __utma=263092572.2480445332142907400.1245865536.1245954231.1246103288.3; __utmz=263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none),[H
TTP_HOST] => arthomobiles.fr,[HTTP_KEEP_ALIVE] => 300,[HTTP_USER_AGENT] => Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11,[REDIRECT_DOMAIN_NAME] => arthomobiles.fr,[REDIRECT_QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REDIRECT_SCRIPT_URI] => http://arthomobiles.fr/piwik/index.php[/url],[REDIRECT_SCRIPT_URL] => /piwik/index.php,[REDIRECT_STATUS] => 200,[REDIRECT_UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[REDIRECT_URL] => /piwik/index.php,[REDIRECT_WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[REDIRECT_WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[REMOTE_ADDR] => 88.162.78.247,[REMOTE_PORT] => 49347,[SCRIPT_FILENAME] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[SCRIPT_URI] => http://arthomobiles.fr/piwik/index.php,[SCRIPT_URL] => /piwik/index.php,[SERVER_ADDR] => 195.47.247.128,[SERVER_ADMIN] => support@one.com,[SERVER_NAME] => arthomobiles.fr,[SERVER_PORT] => 80,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REQUEST_URI] => /piwik/index.php?module=CoreHome&action=index&idSite=1&period=day&date=today,[SCRIPT_NAME] => /piwik/index.php,[ORIG_SCRIPT_FILENAME] => /usr/lib/apache/suexec-allowed-bins/genericphpwrapper,[ORIG_PATH_INFO] => /piwik/index.php,[ORIG_PATH_TRANSLATED] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[ORIG_SCRIPT_NAME] => /php-bin),[_POST] => Array (),[HTTP_POST_VARS] => Array (),[_GET] => Array ([module] => CoreHome,[action] => index,[idSite] => 1,[period] => day,[date] => today),[HTTP_GET_VARS] => Array ([module] => CoreHome,[action] => index,[idSite] => 1,[period] => day,[date] => today),[_COOKIE] => Array ([piwik_visitor1] => 1=NGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk=:2=MTI0NjEwMzI5NA==:3=MTI0NjEwMzI5
NA==:4=NTk5NzE=:5=Mw==:11=MQ==:8=Mw==:9=d3d3Lmdvb2dsZS5mcg==:10=:6=Mzg2Nzk=:7=MTI
0MjIzNjczMQ==,[piwik_auth] => login=YWRtaW4=:token_auth=YWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM=,[__utma] => 263092572.2480445332142907400.1245865536.1245954231.1246103288.3,[__utmz] => 263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)),[HTTP_CO
OKIE_VARS] => Array ([piwik_visitor1] => 1=NGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk=:2=MTI0NjEwMzI5NA==:3=MTI0NjEwMzI5
NA==:4=NTk5NzE=:5=Mw==:11=MQ==:8=Mw==:9=d3d3Lmdvb2dsZS5mcg==:10=:6=Mzg2Nzk=:7=MTI
0MjIzNjczMQ==,[piwik_auth] => login=YWRtaW4=:token_auth=YWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM=,[__utma] => 263092572.2480445332142907400.1245865536.1245954231.1246103288.3,[__utmz] => 263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)),[_SERVER
] => Array ([PATH] => /bin:/usr/bin:/usr/local/bin,[FCGI_ROLE] => RESPONDER,[DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[DOMAIN_NAME] => arthomobiles.fr,[HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.7,[HTTP_ACCEPT_ENCODING] => gzip,deflate,[HTTP_ACCEPT_LANGUAGE] => fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3,[HTTP_CONNECTION] => keep-alive,[HTTP_COOKIE] => piwik_visitor1=1%3DNGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk%3D%3A2%3DMTI0NjEwMzI5NA%3D%3D%3A3%3DMTI0NjEwMzI5NA%3D%3D%3A4%3DNTk5NzE%3D%3A5%3DMw%3D%3D%3A11%3DMQ%3D%3D%3A8%3DMw%3D%3D%3A9%3Dd3d3Lmdvb2dsZS5mcg%3D%3D%3A10%3D%3A6%3DMzg2Nzk%3D%3A7%3DMTI0MjIzNjczMQ%3D%3D; piwik_auth=login%3DYWRtaW4%3D%3Atoken_auth%3DYWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM%3D; __utma=263092572.2480445332142907400.1245865536.1245954231.1246103288.3; __utmz=263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none),[H
TTP_HOST] => arthomobiles.fr,[HTTP_KEEP_ALIVE] => 300,[HTTP_USER_AGENT] => Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11,[REDIRECT_DOMAIN_NAME] => arthomobiles.fr,[REDIRECT_QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REDIRECT_SCRIPT_URI] => http://arthomobiles.fr/piwik/index.php,[REDIRECT_SCRIPT_URL] => /piwik/index.php,[REDIRECT_STATUS] => 200,[REDIRECT_UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[REDIRECT_URL] => /piwik/index.php,[REDIRECT_WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[REDIRECT_WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[REMOTE_ADDR] => 88.162.78.247,[REMOTE_PORT] => 49347,[SCRIPT_FILENAME] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[SCRIPT_URI] => http://arthomobiles.fr/piwik/index.php,[SCRIPT_URL] => /piwik/index.php,[SERVER_ADDR] => 195.47.247.128,[SERVER_ADMIN] => support@one.com,[SERVER_NAME] => arthomobiles.fr,[SERVER_PORT] => 80,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REQUEST_URI] => /piwik/index.php?module=CoreHome&action=index&idSite=1&period=day&date=today,[SCRIPT_NAME] => /piwik/index.php,[ORIG_SCRIPT_FILENAME] => /usr/lib/apache/suexec-allowed-bins/genericphpwrapper,[ORIG_PATH_INFO] => /piwik/index.php,[ORIG_PATH_TRANSLATED] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[ORIG_SCRIPT_NAME] => /php-bin,[PHP_SELF] => /piwik/index.php,[REQUEST_TIME] => 1246197657),[HTTP_SERVER_VARS] => Array ([PATH] => /bin:/usr/bin:/usr/local/bin,[FCGI_ROLE] => RESPONDER,[DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[DOMAIN_NAME] => arthomobiles.fr,[HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.7,[HTTP_ACCEPT_ENCODING] => gzip,deflate,[HTTP_ACCEPT_LANGUAGE] => fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3,[HTTP_CONNECTION] => keep-alive,[HTTP_COOKIE] => piwik_visitor1=1%3DNGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk%3D%3A2%3DMTI0NjEwMzI5NA%3D%3D%3A3%3DMTI0NjEwMzI5NA%3D%3D%3A4%3DNTk5NzE%3D%3A5%3DMw%3D%3D%3A11%3DMQ%3D%3D%3A8%3DMw%3D%3D%3A9%3Dd3d3Lmdvb2dsZS5mcg%3D%3D%3A10%3D%3A6%3DMzg2Nzk%3D%3A7%3DMTI0MjIzNjczMQ%3D%3D; piwik_auth=login%3DYWRtaW4%3D%3Atoken_auth%3DYWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM%3D; __utma=263092572.2480445332142907400.1245865536.1245954231.1246103288.3; __utmz=263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none),[H
TTP_HOST] => arthomobiles.fr,[HTTP_KEEP_ALIVE] => 300,[HTTP_USER_AGENT] => Mozilla/5.0 (Windows; U; Windows NT 6.0; fr; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11,[REDIRECT_DOMAIN_NAME] => arthomobiles.fr,[REDIRECT_QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REDIRECT_SCRIPT_URI] => http://arthomobiles.fr/piwik/index.php,[REDIRECT_SCRIPT_URL] => /piwik/index.php,[REDIRECT_STATUS] => 200,[REDIRECT_UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[REDIRECT_URL] => /piwik/index.php,[REDIRECT_WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[REDIRECT_WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[REMOTE_ADDR] => 88.162.78.247,[REMOTE_PORT] => 49347,[SCRIPT_FILENAME] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[SCRIPT_URI] => [url=http://arthomobiles.fr/piwik/index.php]http://arthomobiles.fr/piwik/index.php,[SCRIPT_URL] => /piwik/index.php,[SERVER_ADDR] => 195.47.247.128,[SERVER_ADMIN] => support@one.com,[SERVER_NAME] => arthomobiles.fr,[SERVER_PORT] => 80,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[UNIQUE_ID] => Skd3mMMv94AAAE8tr8E,[WEBC_USER_DOCUMENT_ROOT] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www,[WEBC_USER_DOMAIN_NAME] => arthomobiles.fr,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => module=CoreHome&action=index&idSite=1&period=day&date=today,[REQUEST_URI] => /piwik/index.php?module=CoreHome&action=index&idSite=1&period=day&date=today,[SCRIPT_NAME] => /piwik/index.php,[ORIG_SCRIPT_FILENAME] => /usr/lib/apache/suexec-allowed-bins/genericphpwrapper,[ORIG_PATH_INFO] => /piwik/index.php,[ORIG_PATH_TRANSLATED] => /customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php,[ORIG_SCRIPT_NAME] => /php-bin,[PHP_SELF] => /piwik/index.php,[REQUEST_TIME] => 1246197657),[_FILES] => Array (),[HTTP_POST_FILES] => Array (),[_REQUEST] => Array ([module] => CoreHome,[action] => index,[idSite] => 1,[period] => day,[date] => today,[piwik_visitor1] => 1=NGQ3YTk3NTkwZjY5MjQ0NjUzYjA5ODQzMjUwNTJkYjk=:2=MTI0NjEwMzI5NA==:3=MTI0NjEwMzI5
NA==:4=NTk5NzE=:5=Mw==:11=MQ==:8=Mw==:9=d3d3Lmdvb2dsZS5mcg==:10=:6=Mzg2Nzk=:7=MTI
0MjIzNjczMQ==,[piwik_auth] => login=YWRtaW4=:token_auth=YWRhZDZlOTcyNTlkMWE3ZmQ3NjVhYTIwMWU1ODc1ZTM=,[__utma] => 263092572.2480445332142907400.1245865536.1245954231.1246103288.3,[__utmz] => 263092572.1245865536.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)),[piwik_m
inimumPHPVersion] => 5.1.3,[piwik_currentPHPVersion] => 5.2.10,[piwik_zend_compatibility_mode] => 0,[HTTP_SESSION_VARS] => Array (),[_SESSION] => Array (),[_Event_Dispatcher] => Array ([NotificationClass] => Event_Notification))) called at [/customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/core/PluginsManager.php:509]
#1 require_once(/customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/core/PluginsManager.php) called at [/customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/core/FrontController.php:24]
#2 require_once(/customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/core/FrontController.php) called at [/customers/arthomobiles.fr/arthomobiles.fr/httpd.www/piwik/index.php:48]

Fixed in Piwik 0.4.1.