Fatal error: Cannot use database wcf

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=1049

Information:

error message: Cannot use database wcf
error code: 1049
sql type: MySQLDatabase
sql error: Unknown database 'wcf'
sql error number: 1049
sql version:
file: /var/www/wcf/lib/system/database/MySQLDatabase.class.php (57)
php version: 5.2.6-1+lenny3
wcf version: 1.0.0
date: Sat, 07 Nov 2009 13:13:28 +0000
request: /wbb/index.php
referer:

Stacktrace:

#0 /var/www/wcf/lib/system/database/Database.class.php(75): MySQLDatabase->selectDatabase()
#1 /var/www/wcf/lib/system/WCF.class.php(206): Database->__construct(...)
#2 /var/www/wcf/lib/system/WCF.class.php(46): WCF->initDB()
#3 /var/www/wbb/global.php(15): WCF->__construct()
#4 /var/www/wbb/index.php(7): require_once('/var/www/wbb/gl...')
#5 {main}