The DASHBOARD tab results in the following error:

Fatal error: Call to undefined method SugarChart::getXMLFileName() in C:\xampp\htdocs\sugarcrm\modules\Charts\Dashlets\O pportunitiesByLeadSourceByOutcomeDashlet\Opportuni tiesByLeadSourceByOutcomeDashlet.php on line 227

Also the dashlet All Opportunities By Lead Source By Outcome result in an error:
Fatal error: Call to undefined method SugarChart::getXMLFileName() in C:\xampp\htdocs\sugarcrm\modules\Charts\Dashlets\O pportunitiesByLeadSourceByOutcomeDashlet\Opportuni tiesByLeadSourceByOutcomeDashlet.php on line 227

I'm using:
- operating system Windows XP SP1
- Sugar Suite : Community Edition version 5.1.0beta
- webserver Apache
- PHP version 2.11.1
- MySQL sever version: 5.0.45

I'have gone through most of all the discussions, nothing helps so far.

Anyone an idea?