vBulletin Database Error!

Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Too many connections
/home/k65k/public_html/vb/includes/class_core.php on line 311

MySQL Error   :
Error Number  :
Request Date  : Monday, July 18th 2011 @ 07:34:15 AM
Error Date    : Monday, July 18th 2011 @ 07:34:15 AM
Script        : http://www.k65k.com/vb/showthread.php?p=6073
Referrer      :
IP Address    : 209.85.226.84
Username      :
Classname     : vB_Database
MySQL Version :