Error including required files: Can't locate UltBB.setup in @INC (@INC contains: /usr/lib/perl5/5.00503/i386-linux /usr/lib/perl5/5.00503 /usr/lib/perl5/site_perl/5.005/i386-linux /usr/lib/perl5/site_perl/5.005 .) at ubbmisc.cgi line 39.
Make sure these files exist, permissions are set properly, and paths are set correctly.