Windows 8 Activate Working 100%

Alright so, I've grabbed my copy of this latest leaked build, installed it - all worked like a charm, turned Aero off, got all those fancy new stuff etc etc... But, I forgot about something - and that's Windows 8 activation. I've read on other forums you can change product keys and stuff like that - tried all Win 7 beta keys, and I keep getting the same error when I try to activate (online). I've got no other options, like activating from phone. I tried with both original copy of GenuineCenter.dll and some other ones I found on the internet for this build - but nothing helps! I've uploaded images below so you could understand my problem better.

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