UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support My Pollmanager doesn't work anymore

Anyhow my Pollmanager isn't working anymore. I get a white screen, the url is "http://...mywebsiteurl.../forum/ubbthreads.php?ubb=pollmanager&id=......."

Does anyone has a suggestion where to look.
I enabled error messages in php.ini this didn't give any error messages.
Then opened the Apache error_log, no errors, then the acces log files hows me the requested url and no errors. I cleared my cache. There are create Poll right on the specific forum.

Maybe the poll manager file is corrupted.
It should be in scripts/pollmanager.inc.php

You can try "www.myweb.com/forum/ubbthreads.php?ubb=pollmanager"
and you should get a message:

Poll Manager
This window doesn't have a valid id. Please close this window and reopen .

Empty screen, probably corrupted file. I'll upload it again...
Thnx

Still a blank screen

I guess it is time to call on the big guns and open a trouble ticket.

That's what i was trying to avoid....
Are there no more trouble shooting options?