Error when sending a PM

[guardian]

Hi, I'm getting the following error when sending a PM:

mySQL query error: INSERT INTO idg_message_topics (mt_msg_id,mt_date,mt_title,mt_from_id,mt_to_id,mt_vid_folder,mt_tracking,mt_addtosent,mt_hasattach,mt_owner_id,mt_hide_cc) VALUES(68774,1209765402,'Re:BoD: Weapons RP',18762,16834,'in','',0,0,16834,'')

SQL error: MySQL server has gone away
SQL error code:
Date: Friday 02nd 2008f May 2008 09:56:42 PM

thanks,

guardian