When posting please read Writeup Formatting Tips, it may be worth while reading How do I post a question effectively? also.

Did you look at the XAMPP documentation? Apparently you need to install "XAMPP Add-Ons" if your version of XAMPP is earlier than 1.7.2, as of this version mod_perl and 'a selection of important Perl Modules' are included as standard.

Update: fixed link to How do I post a question effectively?, thanks Corion.

Martin