I have to modify the return value of do_form_check()
to : "return $doomed == $check ? true : [:"red"]true[/] ; "
So my forum works again.

But I know it is wrong ,it seems some security form check , and shouldn't be skipped.

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.