Q: AppleCare Registration Problem

I got a new 13'' MacBook Pro for Christmas this year (2012), and my parents got me the AppleCare Protection Plan with it. When I got to register it online, it says:

We're sorry, but the registration number does not match the product or agreement type you have selected. Please check your agreement type or serial number and re-enter the information. If the information is correct, you may need to contact us.

I know I am entering all the information correctly, so I don't know what's wrong.

If anyone has had the same problem, I would love help!

Thanks so much ya'll!