Fatal error: Link-ID == false, connect failed

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=1040

Information:

error message: Link-ID == false, connect failed
error code: 1040
sql type: MySQLDatabase
sql error: Too many connections
sql error number: 1040
sql version:
file: /homepages/21/d172447110/htdocs/kinoplanet/wcf/lib/system/database/MySQLDatabase.class.php (29)
php version: 5.2.14
wcf version: 1.0.0
date: Thu, 09 Sep 2010 15:31:01 +0000
request: /index.php?page=User&userID=1188
referer:

Stacktrace:

#0 /homepages/21/d172447110/htdocs/kinoplanet/wcf/lib/system/database/Database.class.php(72): MySQLDatabase->connect()
#1 /homepages/21/d172447110/htdocs/kinoplanet/wcf/lib/system/WCF.class.php(206): Database->__construct(...)
#2 /homepages/21/d172447110/htdocs/kinoplanet/wcf/lib/system/WCF.class.php(46): WCF->initDB()
#3 /homepages/21/d172447110/htdocs/kinoplanet/global.php(15): WCF->__construct()
#4 /homepages/21/d172447110/htdocs/kinoplanet/index.php(7): require_once('/homepages/21/d...')
#5 {main}