I don't know what happened to my forum.
After doing some server migration , all users cannot post.
It shows "The form you have submitted is no longer valid. "
Why !!???

What is do_form_check() doing in ubbt.inc.php ?

Why the same code runs OK in old server but failed in another server?


what should I do now ???

English is not my native language. I try my best to express my thought precisely. I hope you understand what I mean. If any misunderstanding results from culture gaps, I apologize first.