database error!

[bosanci28]

for few days i get this database error coming in my email...

and i did not do any mod,or anything to the site in the last week or so,
and i get this error:

Database error in vBulletin :
 
mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: User xxxxxx_xxxxxx  already has more than 'max_user_connections' active connections
/home/xxxxx/public_html/xxxxxxx/includes/class_core.php on line 314
 
MySQL Error   :
Error Number  :
Request Date  : Tuesday, August 23rd 2011 @ 07:12:55 PM
Error Date    : Tuesday, August 23rd 2011 @ 07:12:55 PM
Script        : http://xxxxxxxxxx.com/forumdisplay.php?35-Filme-Engleza
Referrer      :
IP Address    : xxxx.xx.xx.xxx
Username      :
Classname     : vB_Database
MySQL Version :

any idea why?
thanks,