Database Issue

[38modify]

Hi all. Major issue here. Seems, that everytime I try to delete a post on my admin account, I get a database error every single time.

This is what I get -

MySQL Error   : Table './investme_forum/searchcore_text' is marked as crashed and should be repaired
Error Number  : 145
Request Date  : Tuesday, September 21st 2010 @ 10:16:32 AM
Error Date    : Tuesday, September 21st 2010 @ 10:16:32 AM
Script        : http://site.com/inlinemod.php?do=dodeletethreads&threadids=42
Referrer      : http://site.com/login.php?do=login
IP Address    : 71.163.56.147
Username      : reff
Classname     : vB_Database
MySQL Version : 5.1.50

Thanks to anyone who can help me with this.