Forum MySQL Error : Table 'rvmp_cache' is read only

[محروم.كوم]

Hi,
We got the following Mysql problem. It happend everyday. So Could you please give us your advice How to recover this?
Thank you very much



Database error in vBulletin 4.0.1:

Invalid SQL:

UPDATE rvmp_cache
SET locktime = 1264827375
WHERE cacheid = 'forumblock.d9d73c94ef6c3b56abc5dae71beceac8';

MySQL Error : Table 'rvmp_cache' is read only
Error Number : 1036
Request Date : Saturday, January 30th 2010 @ 11:56:15 AM
Error Date : Saturday, January 30th 2010 @ 11:56:15 AM
Script : http://www.raovatmienphi.com/forum/index.php
Referrer :
IP Address : 115.76.97.84
Username : thangnam
Classname : vB_Database

MySQL Version : 5.0.67-community __DEFINE_LIKE_SHARE__