Forum Sql error

[محروم.كوم]

We have been getting this error now for over a week and our service provider can not give us any answers as to why can some one give us some idea's
They Suggested one of our modules was corrupt and causing it the only one that is not working correctly is the block module online users it will not display in the forums

Database error in vBulletin :

mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

/home/edited/public_html/forums/includes/class_core.php on line 312

MySQL Error :
Error Number :
Request Date : Friday, April 30th 2010 @ 05:19:35 AM
Error Date : Friday, April 30th 2010 @ 05:19:35 AM
Script : http://www.oldschoolshooters.net/cmps_index.php
Referrer :
IP Address :
Username :
Classname : vB_Database
MySQL Version : __DEFINE_LIKE_SHARE__