Just had UBB.threads installed. It worked briefly. I made a few changes to general options that didn't change critical items already set up by the installer. Now when I try to access forums I get an error message that says "No input file specified." I am dead in the water. What did I do?

I can see my control panel OK. No access to forums, FAQ, or other functions on the product menu bar.

This turned out to be that the server doesn't handle search engine friendly urls. Working this in a ticket.

Sounds wonderful ;)... i had this happen on a clients site which was running really anal securty settings :/...