I push continue and Aperture responds "Try Later on" ... day after day ....
For some posters it turned out that this problem was caused by the new security checks on password and security questions. If the answers to your security questions are too short (less than six letters) and your password does not contain at least one upper case letter and a numeral, the Apple Store will not except it and simply refuse service - but without saying why.
See the requirements here: Apple ID: Tips for protecting the security of your account
If your security settings do not meet these requirements, reset them at MyAppleID: