Did you make HTTrack log in to your forum account?  Some info:
<http://httrack.kauler.com/help/Form-based_authentication>

>>> Thanks, this is helpful! I'll try tonight.

Yes, this is a known "copy".  You can read info here:
<http://httrack.kauler.com/help/Someone_is_selling_HTTrack>

>>> Doh, I was hornshwaggled! :)