PHPWIND5.3论坛短信发信箱错误

Query Error: SELECT mid,fromuid,touid,username,ifnew,title,mdate FROM pw_msg WHERE type='sebox' AND fromuid='41' ORDER BY mdate DESC LIMIT -30,30

The URL Is:
http://www.jerm.cn/bbs/message.php?action=sendbox

MySQL Server Error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-30,30' at line 1 ( 1064 )

You Can Get Help In:
http://www.phpwind.net

论坛http://www.jerm.cn/bbs的发信箱出现问题，如何解决？