lost headers

Hello all...

I have a simple mod_perl program that does some custom role based
authentication before granting access to certain resources.  That part does
work, but for a new feature I need to be able to embed roles into my
headers.  Try as may, try as I might, those roles never show up...


consider a portion of my mod_perl program:

sub handler {
...
if($user) {
        my $val = rest_call($user,$context, $r->log);
        my $roles = $cache_hash{'roles'}->{$user};
        my $role_string = join(',', @$roles);
        $r->headers_out->set('prisme-roles'=> $role_string );
        #$r->headers_out->add('prisme.roles'=> $role_string );
        $r->err_headers_out->add('prisme-roles2', $role_string);
        #$|++;
        $r->rflush();# $r->rflush can't be called before the response phase
if using PerlFixupHandler Prisme::ValidateHeader
        $r->log->info("Request end on pid $$: The user for this request is
$user, the roles are $role_string, returning $val");
        return $val; #OK or FORBIDDEN
        }

With either config in http.conf:

<Location /rails_prisme/>
  SetHandler perl-script
  PerlResponseHandler Prisme::ValidateHeader
  #PerlFixupHandler Prisme::ValidateHeader
</Location>

My Ruby on Rails controller: