If you can't get it to work in Lynx, you're not going to be able to get it to work from Perl.

Some possibilities

• It requires Javascript to use, in which case you're pretty close to screwed
• It requires cookies, which are disabled in your copy of Lynx, in which case you just have to enable them in Lynx and in your Perl program.
• It's doing some kind of browser detection, in which case you'll have to make your Perl script lie about what kind of browser it is.

If it works from another browser, like Mozilla, I would recommend using a packet sniffer to see exactly what's going on, then see how what your script is doing is different.