مشكلة في المنتدى ... الرجاء المساعدة

[B][SIZE="5"]Invalid SQL:[/SIZE][/B]
[B][SIZE="5"]  SELECT COUNT(*) AS threads, SUM(IF(thread.lastpost > 1273836223 AND open <> 10, 1, 0)) AS newthread[/SIZE][/B]
[B][SIZE="5"]  [/SIZE][/B]
[B][SIZE="5"]  FROM thread AS thread[/SIZE][/B]
[B][SIZE="5"]  [/SIZE][/B]
[B][SIZE="5"]  [/SIZE][/B]
[B][SIZE="5"]  WHERE forumid = 13[/SIZE][/B]
[B][SIZE="5"]   AND sticky = 0[/SIZE][/B]
[B][SIZE="5"]   [/SIZE][/B]
[B][SIZE="5"]    AND visible IN (0,1,2);[/SIZE][/B]
[B][SIZE="5"]MySQL Error   : Table './القاعدة/thread' is marked as crashed and last (automatic?) repair failed[/SIZE][/B]
[B][SIZE="5"]Error Number  : 144[/SIZE][/B]
[B][SIZE="5"]Request Date  : Friday, May 14th 2010 @ 07:54:09 AM[/SIZE][/B]
[B][SIZE="5"]Error Date    : Friday, May 14th 2010 @ 07:54:09 AM[/SIZE][/B]
[B][SIZE="5"]Script        : http://www.XXXX.com/forumdisplay.php?f=13[/SIZE][/B]
[B][SIZE="5"]Referrer      : http://www.XXXX.com/[/SIZE][/B]
[B][SIZE="5"]IP Address    : XXXXXXXXXX[/SIZE][/B]
[B][SIZE="5"]Username      : XXXXXXXXX[/SIZE][/B]
[B][SIZE="5"]Classname     : vb_database[/SIZE][/B]
[B][SIZE="5"]MySQL Version : 5.0.45-log[/SIZE][/B]