Debug - RT

Hi Folks!

I want to use interactive debug for RT, I saw this information
http://wiki.bestpractical.com/view/Debug, but when i try to use,
doesn’t work.

My configuration file is /etc/httpd/conf.d/perl.conf

<VirtualHost 172.16.193.3>
ServerName rt.osa.cl
ServerAdmin psilva@osa.cl

DocumentRoot /opt/rt3/share/html
AddDefaultCharset UTF-8

# optional apache logs for RT
 ErrorLog /opt/rt3/var/log/apache2.error
 TransferLog /opt/rt3/var/log/apache2.access
use Apache::DB (); Apache::DB->init;
<Location />
  PerlFixupHandler Apache::DB
</Location>
PerlRequire "/opt/rt3/bin/webmux.pl"

<Location /NoAuth/images>
    SetHandler default
</Location>
<Location />
    SetHandler perl-script
    PerlResponseHandler RT::Mason
</Location>

Thanks in advance!

Pablo