[Share Pack Code] - Activation code issues / Code is missing

Hey! I just got skate 3 directly from the store, I come home happy because I wanted to play online with my friends... Then I find a code in my CD case that says "Register online at Ea.onlineregister.com" and a code longer down.. So I went to that site and made an account.. But Then? Can't find where I'm going to type it in, I tried the one when you activate games But that didn't work. Please help me !