Fatal error: Cannot use database eG-forum

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

Information:

error message: Cannot use database eG-forum
error code: 1049
sql type: MySQLDatabase
sql error: Unknown database 'eG-forum'
sql error number: 1049
sql version:
file: /var/www/eGforum/wcf/lib/system/database/MySQLDatabase.class.php (57)
php version: 5.3.3-7+squeeze3
wcf version: 1.0.10 (Horizon)
date: Sat, 28 Jan 2012 14:07:36 +0000
request: /eGforum/
referer:

Stacktrace:

#0 /var/www/eGforum/wcf/lib/system/database/Database.class.php(79): MySQLDatabase->selectDatabase()
#1 /var/www/eGforum/wcf/lib/system/WCF.class.php(270): Database->__construct(...)
#2 /var/www/eGforum/wcf/lib/system/WCF.class.php(88): WCF->initDB()
#3 /var/www/eGforum/global.php(18): WCF->__construct()
#4 /var/www/eGforum/index.php(7): require_once('/var/www/eGforu...')
#5 {main}