[CMS] Attachments errors

[ashley76]

I keep getting this particular error emailed to me quite a bit for different articles with attachments...

Database error in vBulletin 4.0.1:

Invalid SQL:

UPDATE session
SET location = '/attachment.php?attachmentid=963&cid=18', badlocation = 0, useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)'
WHERE sessionhash = '7b3856cfcd1192594d827c92b6422c05';

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Tuesday, February 2nd 2010 @ 05:43:23 PM
Error Date : Tuesday, February 2nd 2010 @ 05:43:57 PM
Script : http://www.bzzurkk.com/attachment.ph...tid=963&cid=18
Referrer : http://www.bzzurkk.com/2010/01/the-m...reviews-12810/
IP Address : 69.15.110.149
Username : Unregistered
Classname : vB_Database
MySQL Version :

What's going on?