CMS 500 internal sever error
 

I keep getting this error its a 500 internal server error it only ever happens on the cms, the forums and blog are unaffected.....

MySQL Error : Got a packet bigger than 'max_allowed_packet' bytes
Error Number : 1153
Request Date : Monday, February 15th 2010 @ 05:45:24 PM
Error Date : Monday, February 15th 2010 @ 05:45:42 PM
Script : http://www.site/forum/content.php?38-Forum-Additons
Referrer : http://www.site/forum/content.php?1-home/addcontent&contenttypeid=30&postid=29857&parentid= 1
IP Address : 87.115.194.178
Username : RoG GhOsT RV
Classname : vB_Database
MySQL Version : 5.0.89-community

Database error in vBulletin 4.0.1:

Invalid SQL:

REPLACE INTO vb_cache
SET cacheid = 'widget.ae66c4fbcc69ccaea7c7f184807d82f8',
expires = 1266274224,
created = 1266273924,
locktime = 0,
data = "O:17:\"vB_Search_Results\":10:{s:23:\"\0vB_Se arch _Results\0user\";O:21:\"vB_Legacy_CurrentUser\":5: {s:14:\"\0*\0attachments\";N;s:16:\"\0*\0hidden_fo rums\";N;s:22:\"\0*\0unsearchable_forums\";N;s:11: \"\0*\0registry\";O:11:\"vB_Registry\":105:{s:9 :\" datastore\";O:12:\"vB_Datastore\":5:{s:12:\"defaul titems\";a:13:{i:0;s:7:\"options\";i:1;s:9:\"bitfi elds\";i:2;s:15:\"attachmentcache\";i:3;s:10:\"for umcache\";i:4;s:14:\"usergroupcache\";i:5;s:10:\"s tylecache\";i:6;s:13:\"languagecache\";i:7;s:8:\"p roducts\";i:8;s:10:\"pluginlist\";i:9;s:4:\"cron\" ;i:10;s:12:\"profilefield\";i:11;s:9:\"loadcache\" ;i:12;s:11:\"noticecache\";}s:8:\"registry\";R:6;s :8:\"dbobject\";O:11:\"vB_Database\":18:{s:9:\"fun ctions\";a:21:{ etc................ there is alot more its like a million characters.....