What is this SQL Error??

[kmfdm_kid2000]

This happened all of the sudden, I wasn't even NEAR the new Database (FRESH one, since I didn't receive help fixing the old one from anyone but Filburt, sadly, I was not able to recover yet...)

Anyway, why am I and my users getting this:

Database error in vBulletin 2.3.0:

Invalid SQL: SELECT threadid,lastpost
FROM thread
WHERE forumid = 224
AND visible=1
AND sticky=1

mysql error: Can't open file: 'thread.MYI'. (errno: 145)

mysql error number: 1016

Date: Tuesday 15th of April 2003 06:28:06 AM
Script: http://www.gqforums.com/forumdisplay.php?forumid=224
Referer:

Happens when trying to connect to almost ANY PHP file in the root, Forumdisplay, usercp.php, private.php, etc...I was working on COLORS and BUTTONS, not even on the server, so I KNOW it wasn't due to me doing something, so what gives??