SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): cannot use database nennertheim_01
mysql error: Access denied for user 'nennertheim'@'%' to database 'nennertheim_01'
mysql error number: 1044
mysql version: 5.0.51a-24+lenny3
php version: 5.2.6-1+lenny6
Date: 10.03.2010 @ 23:58
Script: /register.php
Referer: