Was asked registration after maintenance and early access code wont work..

[Chrysus]

Nope... still the same thing. Try to log in and it asks me for my 20 digit code. Try to apply my code and it says it's already in use.

Are you using your new code? You may be using the old 20 digit early access (pre order) code. You need to input the 20 digit code that came bundled with your physical copy of the Collectors edition. Have you received your collectors edition?