I'm guessing it's your directory structure and some odd setting in your webserver.

http://www.tequestacove.com/ubb/ubbthreads.php?ubb=cfrm

The UBB variable is being forced to ubbthreads. Somehow it appears your webserver is parsing the /ubb/ubbthreads portion and reading that as a variable. You might try moving it a different directory instead of ubb, you'll need to manually edit the config file to change the directory path.