'Too Many Connections' Database Error
 

Can someone make sense of this error for me?

Code:
Database error in vBulletin :

mysql_connect() [function.mysql-connect]: Too many connections
/home/username/public_html/forum/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Sunday, February 14th 2010 @ 10:39:24 PM
Error Date : Sunday, February 14th 2010 @ 10:39:24 PM
Script : http://www.mysite.com/forum/online.p...e&pp=50&page=1
Referrer : http://www.mysite.com/forum/online.p...e&pp=50&page=1
IP Address : 72.72.722.72
Username :
Classname : vB_Database
MySQL Version :