It sounds like you installed the update version of atres,
you need the full version.
Code:
http://www.mediafire.com/download/p35nzym1n418yl5/a3toMP4v17.2F.exe
If you get atres running, you don't need to do anything other than enter the url of the video page, because atres runs the php script(s) automatically. The other steps described in this thread are about doing it manually without any program.