Look into your errorlog file to verify that your mod_perl is running. Another option is to try a

HEAD http://yourhost/
[download]

and watch your server header. It s enabled by default. Here is my one:

Server: Apache/2.0.49 (Unix) mod_perl/1.99_14 Perl/v5.8.3 mod_ssl/2.0.
+49 OpenSSL/0.9.7d DAV/2 SVN/1.0.2
[download]