I hope what you're trying to do is still ethical...

Some web pages check all kind of parameters. I once had the problem that I wanted people to be able to send me SMS via e-mail. I used a perl script that read the e-mail and access my phone company's website to fill in a form to submit the SMS. I started out being honest, giving a nice and true user-agent name (with my e-mail adress) etc., but made more and more changes until the site accepted my submissions.

Well, to cut this short:

• Take a look at all the variables your browser submits (e.g. at http://www.web42.com/cgi-bin/test.cgi, you can also submit a form to that).
• Build a basic script to access the page -- jeffa submitted an excellent script a few hours ago: (jeffa) Re: Simulating Form Posts from within Perl. This would be a good start.
• Add more and more parameters. For my script, I needed:

    my $agentname = 
        'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)';
    my $ua = new LWP::UserAgent;
    $ua->agent($agentname);

    my $request = GET $send_url;

# Fake IE...
    $request->header('Accept' => 'image/gif, image/x-xbitmap, image/jp
+eg, image/pjpe
g, application/vnd.ms-powerpoint, application/vnd.ms-excel, applicatio
+n/msword,
*/*');
    $request->header('Accept-Language' => 'en-us');
    $request->header('Referer' => $referer);

    my $response = $ua->request($request);
[download]

It seems likely that you need to accept  Cookies as well. Take a look at what you are getting -- maybe you need to reaccess the page because you got redirected together with a cookie:

    if ($res->is_redirect()) {
        my $loc = $res->header('Location');
        # create new request like above
        # and reaccess site
    }
[download]

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