vBulletin Database Error class_core plz help

[Seleno]

Hi there
i'm getting much Vbulletin Database Error in my forums
this is the message:::::::::::::::::

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (11)
/home/UserName/public_html/vb/includes/class_core.php on line 313

how can i solve this problem?
waiting your help

[Marco van Herwaarden]

Please see the manual: Can't connect to local MySQL server through socket (http://www.vbulletin.com/docs/html/cantconnect)

[ahmed-samara]

Poor server should transfer servers

[Seleno]

hi there....
is this problem from the server ahmed?
but i have big forum without these problems !!!
i have problems in the small forum only !
and how can i optomize my server?
waiting yr help

[bluered]

how can i solve this problem?

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) /home/xxxxxxxxx/public_html/includes/class_core.php on line 313