in reply to using Mechanize

The page has Javascript. WWW::Mechanize does not support Javascript.

You will need to find out what values your browser sends when you manually submit the information using your browser. See for example the Firefox Live HTTP Headers extension. Send that same data using WWW::Mechanize.

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Re^2: using Mechanize
by runrig (Abbot) on Apr 22, 2016 at 22:00 UTC
    Firebug is also an option, especially when Live HTTP Headers doesn't catch all of the requests (I think it was XMLHttpRequests I was having an issue with).
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