Iphone suddenly asks to be activated ios7 beta?

I have ios7 beta installed and I have my UDID registered.
Today suddenly my iPhone says it need to be activated, and that I should log in the account that was used to activate the device at the beginning. I have two appstore accounts and wasn't sure what to use.
When I use the first one, it says 'Incorrect Apple ID. This email can't be used to unlock this phone'.
And when I use the second one, nothing happens.
I think it has something to do with the fact that I have beta 2 or 3…
What should I do?

If you did get IOS7 BETA the proper way and got the developer key than it would be best to go to developer.apple.com and contact them directly. Since the IOS7 is not out yet publicly from what I've ran into the tech support people have not been trained on it yet and will refer you to that website anyway.