沈阳607专案任世伟:某个论坛上不了了,出现如下提示,是什么原因?

有时候出现:
Query Error: SELECT m.uid,m.password,m.groupid,m.yz,md.onlineip FROM pw_members m LEFT JOIN pw_memberdata md ON md.uid=m.uid WHERE username='此为用户名,以隐藏'

The URL Is:
http://此为网站地址,以隐藏/login.php?

MySQL Server Error:
Can't open file: 'pw_members.MYI'. (errno: 145) ( 1016 )

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

有时候出现
Query Error: SELECT m.uid,m.username,m.password,m.email,oicq,m.groupid,m.memberid,m.regdate,m.timedf,m.style,m.datefm,m.t_num,m.p_num,m.yz,m.newpm,m.showsign,m.payemail,m.passport,md.postnum,md.rvrc,md.money,md.credit,md.currency,md.lastvisit,md.thisvisit,md.onlinetime,md.lastpost,md.todaypost,md.onlineip,md.uploadtime,md.uploadnum,md.editor,md.starttime,md.onlinetime,md.payonline,md.nopay FROM pw_members m LEFT JOIN pw_memberdata md USING(uid) WHERE m.uid='80510'

The URL Is:
http://此为网站地址,以隐藏/login.php?

MySQL Server Error:
Can't open file: 'pw_members.MYI'. (errno: 145) ( 1016 )

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