Error: The table 'session' is full (1114 )

[محروم.كوم]

Invalid SQL:

INSERT IGNORE INTO session
(sessionhash, userid, host, idhash, lastactivity, location, styleid, languageid, loggedin, inforum, inthread, incalendar, badlocation, useragent, bypass, profileupdate)

VALUES
('7f7b13a9014fae4008430b91c8a5e970', 0, '87.109.139.31', '6fdcdaee4f515e2a819ee56c26b0cf78', 1241312562, '/', 0, 0, 0, 0, 0, 0, 2, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)', 0, 0);

MySQL Error : The table 'session' is full
Error Number : 1114
Request Date : Saturday, May 2nd 2009 @ 0942 PM
Error Date : Saturday, May 2nd 2009 @ 0943 PM
Script : http://forums.mysite.com/
Referrer : http://mysite.com/ads.html
IP Address : 87.109.139.31
Username : Unregistered
Classname : vB_Database
MySQL Version :

I have lock permissions enabled on my DB and i am getting this error from last 3 days __DEFINE_LIKE_SHARE__