So I think the issue is that when you resubmit the form, you're using post which will try and generate a HTTP::Request object. The problem is that you already have such an object.

Here's an example from http://www.icewalkers.com/Perl/5.8.0/lib/HTML/Form.html:

 use HTML::Form;
 $form = HTML::Form->parse($html, $base_uri);
 $form->value(query => "Perl");

 use LWP;
 LWP::UserAgent->new->request($form->click);
[download]

Both click and make_request return request objects, and you can see that they're using LWP's request to send them.

I was trying to point you to this in my first post, though I admit that it was pretty unclear. Check out http://kobesearch.cpan.org/htdocs/libwww-perl/LWP/UserAgent.html#ua_gt_request_request.

See how $ua->request sends a request object? Try that on your $req which is such a request object, and let me know if that doesn't work.

Hays