Problem with forms hack

I hope this is not OT since it concerns a hack: Form Hack - vBulletin.org Forum

I had several forms up and working before installing vbseo. After activating vbseo, they do no longer work; the problem: forms are not being posted into the specified thread, and the redirection to the thread does not work either. The hack queries "$newpost[threadid]" for the needed information, and after installing vbseo this variable seems to be empty. When deactivating vbseo everything works fine.

Any clues or suggestions out there?

Thank you,
cellarius

I've just installed that hack in testing environment and it works fine with vBSEO for me.