That is exactly what I did. Installed the game through steam. I created an account when launching through steam. I am unable to play.

Hello, I recently bought TM2 canyon on steam but when I launch through steam I cannot play. I only have the option to buy the full game, which I did. I spent $20 on this game and now I can't play it. I copy the steam CD key to the "key" section but just get some error about needing a steam...