Make sure that this file exhists off of your paintball2 directory just in case: /Paintball2/pball/menus/setup_funname.txt
If you installed in windows and used the default location it would be here:
C:\Games\Paintball2\pball\menus\setup_funname.txt
If its not there then I'd re-install just to make sure that it installs without failure, and because you may be missing other files too.
If its there then report back and Jits will probably be able to straighten this out.