NBA 2K14 digital release

When I woke up at around noon central the game was available for download on Steam. I purchased on Amazon. They gave me another $5 discount, because the game wasn't available at midnight as promised.

Really? Damn, I preordered and still had to pay full price.

I got the game off of amazon, downloaded it from steam and its up and running, except for for the fact that I cant seem to get past the account creation screen for some reason.... I believe it has something to do with the "CD KEY" thing you have to type in. Im confused because amazon gave me one code and steam a different one, so I tried them both with no luck. I even tried typing them with or without hyphens and capital letters. Can someone please tell me what I'm doing wrong? I know it's probably a noob mistake but I just want to play!

try amazon or steam support