Have ipad2 and can't access iCloud

I'll try this one.

basicly the problem is that when I try to login from the iPad to my name in settings I get popup that say that my account details are not available and I get two buttons , ok and get confirmation code.

How should I pass this stage ??

I didn't forget the password, it doesn't accept the password any more , the password is correct as I'm using it in my IPhone as well.

Managed to get it done, thanks a lot, logged again with my account.