Datacenter Suspend Our Account Because We Had High Resource on /forums/index.php

[mastergame]

Hi All,
We use VBulletin System for our website forums,
We had probelm with our forums in last few days, that i describe below :
Our forums goes to show to users "Database Error" when they try to use the forums .
Our Web Hosting account suspended because our /forums/index.php use 65% CPU Usage and it isn't accept from our hosting provider TOS .
We received 2965 Database Error on our technical email address in 20 minutes that we were under attack .

You can watch one of our database error that we received :


Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: User
GG_forum already has more than 'max_user_connections' active connections
/home/GG/public_html/*.com/forums/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Saturday, November 21st 2009 @ 08:49:47 AM
Error Date : Saturday, November 21st 2009 @ 08:49:48 AM
Script : http://*.com/forums/index.php
Referrer :
IP Address : 74.54.107.135
Username :
Classname : vB_Database
MySQL Version :


I type *.com instead of our domain name for security reasons .

What do you think about this problem and if any one knows about this problem and the way to resolve that, Please Help Us .