Post Installation Error

Hello World, I installed BlueErp on XAMPP - C:\xampp\htdocs\blueerp on Windows XP SP3 I got all the necessary feedback that the installation went ok. Then trying to log in as a user i browsed to http://localhost/blueerp/index.php and got the error instead: Fatal error: Cannot redeclare class bo_Acl in C:\xampp\htdocs\blueerp\entity\inc\class.bo_Acl.inc.php on line 19 what did i do wrong? Please Help & Thanks!