I get the following error after the “General Setup” step.
I have checked permissions, re-uploaded etc. Same problem 
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Cannot modify header information - headers already sent by (output started at /home/prodrinc/public_html/stats/core/Http.php:306)
in ‘/home/prodrinc/public_html/stats/core/Url.php’ at the line 265
#0 Piwik_ErrorHandler(2, Cannot modify header information - headers already sent by (output started at /home/prodrinc/public_html/stats/core/Http.php:306), /home/prodrinc/public_html/stats/core/Url.php, 265, Array ([url] => index.php?action=firstWebsiteSetup&module=Installation&deleteTables=1)) called at [(null):0]
#1 header(Location: index.php?action=firstWebsiteSetup&module=Installation&deleteTables=1) called at [/home/prodrinc/public_html/stats/core/Url.php:265]
#2 Piwik_Url::redirectToUrl(index.php?action=firstWebsiteSetup&module=Installation&deleteTables=1) called at [/home/prodrinc/public_html/stats/core/Piwik.php:1167]
#3 Piwik::redirectToModule(Installation, firstWebsiteSetup) called at [/home/prodrinc/public_html/stats/plugins/Installation/Controller.php:631]
#4 Piwik_Installation_Controller->redirectToNextStep(generalSetup) called at [/home/prodrinc/public_html/stats/plugins/Installation/Controller.php:399]
#5 Piwik_Installation_Controller->generalSetup(The configuration file /home/prodrinc/public_html/stats/config/config.ini.php has not been found.) called at [/home/prodrinc/public_html/stats/plugins/Installation/Installation.php:73]
#6 Piwik_Installation->dispatch(Piwik_Event_Notification Object ([_notificationName] => FrontController.NoConfigurationFile,[_notificationObject] => Exception Object ([] => The configuration file /home/prodrinc/public_html/stats/config/config.ini.php has not been found.,[] => ,[] => 0,[] => /home/prodrinc/public_html/stats/core/Config.php,[] => 111,[] => Array ([0] => Array ([file] => /home/prodrinc/public_html/stats/core/Piwik.php,[line] => 1544,[function] => init,[class] => Piwik_Config,[type] => ->,[args] => Array ()),[1] => Array ([file] => /home/prodrinc/public_html/stats/core/FrontController.php,[line] => 199,[function] => createConfigObject,[class] => Piwik,[type] => ::,[args] => Array ()),[2] => Array ([file] => /home/prodrinc/public_html/stats/index.php,[line] => 58,[function] => init,[class] => Piwik_FrontController,[type] => ->,[args] => Array ()))),[_notificationInfo] => Array (),[_notificationState] => 0,[_notificationCount] => 0)) called at [(null):0]
#7 call_user_func_array(Array ([0] => Piwik_Installation Object ([] => Piwik_Installation_Controller),[1] => dispatch), Array ([0] => Piwik_Event_Notification Object ([_notificationName] => FrontController.NoConfigurationFile,[_notificationObject] => Exception Object ([] => The configuration file /home/prodrinc/public_html/stats/config/config.ini.php has not been found.,[] => ,[] => 0,[] => /home/prodrinc/public_html/stats/core/Config.php,[] => 111,[] => Array ([0] => Array ([file] => /home/prodrinc/public_html/stats/core/Piwik.php,[line] => 1544,[function] => init,[class] => Piwik_Config,[type] => ->,[args] => Array ()),[1] => Array ([file] => /home/prodrinc/public_html/stats/core/FrontController.php,[line] => 199,[function] => createConfigObject,[class] => Piwik,[type] => ::,[args] => Array ()),[2] => Array ([file] => /home/prodrinc/public_html/stats/index.php,[line] => 58,[function] => init,[class] => Piwik_FrontController,[type] => ->,[args] => Array ()))),[_notificationInfo] => Array (),[_notificationState] => 0,[_notificationCount] => 0))) called at [/home/prodrinc/public_html/stats/libs/Event/Dispatcher.php:213]
#8 Event_Dispatcher->addObserver(Array ([0] => Piwik_Installation Object ([] => Piwik_Installation_Controller),[1] => dispatch), FrontController.NoConfigurationFile) called at [/home/prodrinc/public_html/stats/core/PluginsManager.php:377]
#9 Piwik_PluginsManager->addPluginObservers(Piwik_Installation Object ([] => Piwik_Installation_Controller)) called at [/home/prodrinc/public_html/stats/core/PluginsManager.php:260]
#10 Piwik_PluginsManager->loadPlugins() called at [/home/prodrinc/public_html/stats/core/PluginsManager.php:168]
#11 Piwik_PluginsManager->setPluginsToLoad(Array ([0] => CorePluginsAdmin,[1] => CoreAdminHome,[2] => CoreHome,[3] => API,[4] => Widgetize,[5] => LanguagesManager,[6] => Actions,[7] => Dashboard,[8] => MultiSites,[9] => Referers,[10] => UserSettings,[11] => UserCountry,[12] => VisitsSummary,[13] => VisitFrequency,[14] => VisitTime,[15] => VisitorInterest,[16] => ExampleAPI,[17] => ExamplePlugin,[18] => ExampleRssWidget,[19] => ExampleFeedburner,[20] => ExampleRssWidget,[21] => Provider,[22] => Feedback,[23] => Login,[24] => UsersManager,[25] => SitesManager,[26] => Installation)) called at [/home/prodrinc/public_html/stats/core/FrontController.php:206]
#12 Piwik_FrontController->init() called at [/home/prodrinc/public_html/stats/index.php:58]