You'll probably do better to read up on mod_perl and understand how it differs from the environment to which you're accustomed. Your problem has almost nothing to do with Perl, per se.

• http://perl.apache.org/start/index.html
• http://perl.apache.org/
• http://search.cpan.org/~gozer/mod_perl-1.31/mod_perl.pod
• ... and even http://en.wikipedia.org/wiki/Mod_perl