The Product Key could not be validated:
You may be getting this error message if you already registered your Spore serial code with another account. If you have already registered Spore to one email address you will not be able to add the same serial number to a second email address.
If you are unsure what account you used to register Spore, please use the Talk to a Game Advisor link and submit an incident to our support team. They will be able to check the account associated with your serial code.