Database error in vBulletin

[AR MK]

Hello there. I always get this error in my Inbox


Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: User DBUSERNAME already has more than 'max_user_connections' active connections
/home1/USERNAME/public_html/forum/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Sunday, July 18th 2010 @ 07:36:24 PM
Error Date : Sunday, July 18th 2010 @ 07:36:24 PM
Script : http://www.DOMAIN.net/forum/showthread.php?t=5562
Referrer :
IP Address : DELETED
Username :
Classname : vB_Database
MySQL Version :

How can I change 'max_user_connections' in my account ? I have SSH access But I dont know how to do it.

Thanks in advance