Discuz! info: MySQL Query Error

Time: 2010-9-5 4:34pm
Script: /forumdisplay.php

SQL: SELECT t.* FROM [Table]threads t
WHERE t.fid='85' AND t.displayorder IN (0, 1, 2, 3)
ORDER BY t.displayorder DESC, t.lastpost DESC
LIMIT 1960, 20
Error: Sort aborted
Errno.: 1028