Database Error - HELP

[SVTCobraLTD]

This has been going on for the past hour or so....

Database error in vBulletin 3.6.10:

Invalid SQL:
SELECT COUNT(*) AS count FROM post AS post WHERE dateline >= 1238685924;

MySQL Error : Table './xxxxxx_db173406321DB/post' is marked as crashed and should be repaired
Error Number : 145
Date : Thursday, April 2nd 2009 @ 02:49:28 PM
Script :
Referrer :
IP Address :
Username : Administrator
Classname : vB_Database

--------------- Added [DATE]1238701969[/DATE] at [TIME]1238701969[/TIME] ---------------

Repair and Optimize Table gave me this:

post Check Warning: Table is marked as crashed
post Check Status: OK
post Optimize Error: 120 when fixing table
post Optimize Status: Operation failed

[Dismounted]

You should contact your host.