ID, I was asked to enter Apple ID and Password again and, strange, my question and answers was shown, but I had to enter a new one to go a step further.
And are your answers to the security questions conformig to apple's security rules - at least six characters long? The password complicated enough? See Apple ID: Tips for protecting the security of your account
If your password and security questions are too simple, change them. The Apple Store seems to be rejecting them otherwise.