Indeed, 3317 doesn't matter, sorry.
The files above are not offline, they are temporary not reachable. If you open both of them in your browser, you will see the message I mentioned (Aus technischen Gründen ist ein Download momentan nicht möglich.)
What I am asking is that you detect this message, but because JD is making wrong request ('wrong' in terms of 'not equal to a webbrowser'), this message will not even come out on the wire.
Please see my last post for wrong and correct request (there is a rather bogus Location Redirection request, which probably violates the rfcs, but it works in the browser).
premium account log:
http://jdownloader.net:8081/pastebin/41726
free user log:
http://jdownloader.net:8081/pastebin/41727