Fatal error: Cannot use database usr_web0_1

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=1044

Information:

error message: Cannot use database usr_web0_1
error code: 1044
sql type: MySQLDatabase
sql error: Access denied for user 'web0'@'localhost' to database 'usr_web0_1'
sql error number: 1044
sql version:
file: /var/www/web0/html/ratgeber/wbb3/wcf/lib/system/database/MySQLDatabase.class.php (57)
php version: 5.2.6-1+lenny15
wcf version: 1.0.3 pl 2
date: Sat, 04 Feb 2012 14:41:49 +0000
request: /wbb3/sitemap.php
referer:

Stacktrace:

#0 /var/www/web0/html/ratgeber/wbb3/wcf/lib/system/database/Database.class.php(77): MySQLDatabase->selectDatabase()
#1 /var/www/web0/html/ratgeber/wbb3/wcf/lib/system/WCF.class.php(224): Database->__construct(...)
#2 /var/www/web0/html/ratgeber/wbb3/wcf/lib/system/WCF.class.php(46): WCF->initDB()
#3 /var/www/web0/html/ratgeber/wbb3/global.php(20): WCF->__construct()
#4 /var/www/web0/html/ratgeber/wbb3/sitemap.php(4): require_once('/var/www/web0/h...')
#5 {main}