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database error verdi

verilen hata
Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Access denied for user ' xxxxx'@'localhost' (using password: YES)
/home/xxxx/domains/xxxxx.net/public_html/includes/class_core.php on line 274

MySQL Error :
Error Number :
Date : Saturday, May 10th 2008 @ 05:47:13 PM
Script : xxxx.net
Referrer :
IP Address : xxxxxxxx
Username :
Classname : vb_database

yardımcı olabilir misiniz nasıl çözerim bu sorunu