Archive.php problem

Piwik doesn’t track any visits and pages, and shows “Tehere is no data for this report” in all reports.

After the last table archive we have this message. Currently we have more than 5000 website’s and growing.

Error in the last Piwik archive.php run:

5112 total errors during this script execution, please investigate and try and fix these errors. First error was: Got invalid response from API request: http://****************/index.php?module=API&method=VisitsSummary.getVisits&idSite=6&period=day&date=last52&format=php&token_auth=70ccd9aa931a8fb04e2dd2a8ce104302&trigger=archivephp. Response was 'a:2:{s:6:“result”;s:5:“error”;s:7:“message”;s:133:"Mysqli prepare error: Table ‘./a0002967_piwik/piwik_archive_numeric_2013_04’ is marked as crashed and last (automat

Please see: 301 Moved Permanently
but repair the table piwik_archive_numeric_2013_04 instead