I just bought Microsoft office for mac 2011 and every has downloaded except my outlook? It asked for my product key I put it in and it say "The product key is not valid. Make sure that you entered the correct key.  If the key doesn't work, contact Microsoft Customer Service and Support."  what'd I do? 

I just bought Microsoft office for mac 2011 and every has downloaded except my outlook? It asked for my product key I put it in and it say "The product key is not valid. Make sure that you entered the correct key.  If the key doesn't work, contact Microsoft Customer Service and Support."  what'd I do?