Help Database error On online.php

[Dr1nternet]

Hello Need some help please
Online.php to view online users is not working and nothing was modified in it
getting database error, i have replaced a fresh copy for online.php but didnt work any solutions

Database error in vBulletin 4.0.8:

Invalid SQL:

SELECT forumid, moderatorid, permissions, permissions2
FROM forum_moderator
WHERE userid = 1;

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Sunday, November 21st 2010 @ 07:13:21 AM
Error Date : Sunday, November 21st 2010 @ 07:14:17 AM
Script : http://www.lebaneseteam.net/forum/online.php
Referrer : http://www.lebaneseteam.net/forum/online.php
Username : DrInternet
Classname : vB_Database
MySQL Version :


any help please thanks for your help