SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): cannot use database usr_web41_3
mysql error: Unknown database 'usr_web41_3'
mysql error number: 1049
mysql version: 5.0.51a-3ubuntu5.7
php version: 5.2.4-2ubuntu5.10
Date: 04.09.2010 @ 13:06
Script: /board/thread.php?postid=161814
Referer: