vbulletin database errors too many connections

[jeff21up]

Hi
Just lately, the last couple of months I am getting lots of emails about vbulletin db errors, I have submitted tickets to my host and they tell me it is a fault with the script not closing connections properly although I am suspicious of the host as my site has been going down a lot lately. These emails I get always coincide with the site being down. Are they trying to fob me off
I am using Hostnine
This is a typical error message i get

Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: User *****_a****** already has more than 'max_user_connections' active connections
/home/*****/public_html/******/includes/class_core.php on line 274

MySQL Error :
Error Number :
Date : Friday, May 22nd 2009 @ 06:14:45 AM
Script : http://*****.co.uk/forum/showthread.php?t=9279
Referrer : http://******.co.uk/index.php?option...per&Itemid=449
IP Address : 92.27.238.117
Username :
Classname : vB_Database

Could anyone please advise me on this as it is driving me insane
Thanks
Jeff