Digital copy of Transformers Dark of the Moon won't play on my Apple TV

Just purchased Transformers Dark of the Moon and downloaded the digital copy. It won't play on my AppleTV it keeps saying the computer needs to be authorised, however when I follow the steps to authorise the computer I get the message that it already is.

What am I missing? Is this a first day glitch? Should I just RIP the DVD and have done with it?