SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT postid FROM bb1_posts WHERE threadid = '5829' AND visible=1 ORDER BY posttime DESC LIMIT 0, 1
mysql error: Can't open file: 'bb1_posts.MYI' (errno: 145)
mysql error number: 1016
mysql version: 4.1.11-Debian_4sarge7-log
php version: 4.4.4
Date: 09.09.2010 @ 11:52
Script: /forum/thread.php?goto=lastpost&threadid=5829
Referer: