Weird Error?

[Fastbird]

Invalid SQL:

UPDATE session
SET lastactivity = 1222015234, location = '/forums/attachment.php?attachmentid=18&d=1221112282', incalendar = 0, badlocation = 0
WHERE sessionhash = '4fe8fe1e9e5dc0674b3727d4e32c11de';

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Sunday, September 21st 2008 @ 12:40:34 PM
Error Date : Sunday, September 21st 2008 @ 12:41:40 PM
Script : http://ltxtech.com/forums/attachment.php?attachmentid=18&d=1221112282
Referrer : http://ltxtech.com/forums/showthread.php?t=115
IP Address : 70.242.176.127
Username : Hawk 143
Classname : vb_database

Anyone know why I keep getting these in my email?

[Internetcafe]

Server problem ... contact your host.

[Fastbird]

Ok, thanks!