Deflate problem

Hi people,
I've got this problem with DEFLATE.
This is my code example :

  use strict;
  use warnings;
  use Apache2::Filter ();
  use Apache2::RequestRec ();
  use APR::Table ();
  use Cache::FileBackend;
  use Apache2::Const -compile => qw(OK);
  use constant BUFF_LEN => 1024;
  use vars qw($VERSION);

  sub handler {
      unless ($f->ctx) {
          $f->r->headers_out->unset('Content-Length');
          $f->ctx(1);
      }

      my $Hash=$f->r->subprocess_env();
      my $html_page="<b>hello</b>";
      my $content_type="text/html";
      my $len_bytes=length $html_page;
      $f->r->headers_out->set("Content-Length"=>$len_bytes);
      $f->r->headers_out->set("Last-Modified" => time());
      $f->r->content_type($content_type);
      $f->print($html_page);
      return Apache2::Const::OK;
  }

This is my configuration on httpd.conf;
<Location /WSDeflate/*>
   PerlSetOutputFilter DEFLATE
   PerlSetOutputFilter INCLUDES
   SetHandler modperl
   PerlOutputFilterHandler Apache2::AMFWebService
   Allow from all
</Location>

I don't have any response on my browser, why ?

Thanks
Idel
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