MySQL Error : MySQL server has gone away

[Bloggeries]

I moved to a dedicated server and have been getting TONES of these. Another weird thing is if you login sometimes it says not logged in but if you click a sub cat it shows you logged in. Or if you click to go to the main forum it logs you out but you're not logged out.

Getting ~50 errors a day +. Please help!

Database error in vBulletin 3.6.4:

Invalid SQL:

UPDATE session
SET lastactivity = 1210815504, location = '/forum/forumdisplay.php?f=6', inforum = 6, inthread = 0, incalendar = 0, badlocation = 0
WHERE sessionhash = 'b2566c7eae44bfcf85f26341d25c14ba';

MySQL Error : MySQL server has gone away
Error Number : 2006
Date : Wednesday, May 14th 2008 @ 08:38:57 PM
Script : http://www.bloggeries.com/forum/forumdisplay.php?f=6
Referrer : http://www.bloggeries.com/forum/