数据错误 请帮忙看下什么原因 谢谢

Discuz! info: MySQL Query Error

User: admin
Time: 2006-9-7 10:40am
Script: /forumdisplay.php

SQL: SELECT DISTINCT p.authorid AS dotauthor, t.* FROM cdb_threads t LEFT JOIN cdb_posts p ON (t.tid=p.tid AND p.authorid='1')
WHERE t.tid IN (1,2,1145,3126,257) AND t.displayorder IN (2, 3)
ORDER BY displayorder DESC, lastpost DESC
LIMIT 0, 5
Error: Can't open file: 'cdb_posts.MYI'. (errno: 145)
文件无法打开，使用repair.php修复

Similar error report has beed dispatched to administrator before.

这是怎么啦 请问

文件无法打开，使用repair.php修复