Sticking in a use CGI; is not magically going to make it a working webap. You have to write code to make it work. The approach of transforming XML with XSLT to generate a html page is fine. What is missing from your code is the CGI stuff. For example I would expect (at least) something like:

   use strict;
   use warnings;
   use CGI;                             
   $q = CGI->new;                       
   print $q->header,                    
         $q->start_html('blabla'),          
         $q->end_html;
[download]

Where do you create the HTTP header? Where do you tell it to output the html?