Anyone that is having this problem.... I sent in another support ticket and got this reply-
"Actually, our developer thought he fixed this, but I'll need to have him
re-visit. I checked your site and it looks like you have everything
taken care of.. (or at least I don't see any errors.)
The solution was to run
http://www.example.com/forums/install/update_to_latest.php through a web
browser, so that it would upgrade your mysql database layout to match the
new version. Let me know if you need any other help!
Just download the free .19 files from phpbb.com and put the install folder in the forum directory and do the above. Works perfectly now! THANKS PETER!!!!