4
ok. the question is got the answer. that is..
by dump key of error, i quickly find in post.php, one sql get the wrong result. by checking the db table structure, found some fileds are not exists. then check the update program, and find these fields were already been dropped. the problem is clear that wrong post.php i owned. so get the latest code at xoops.org and replace the old post.php. it is ok.
but i am so curious that why the version of post.php is wrong... :(:(
hope this can help you!!