Steam Gave Me An Invalid CD Key

[IdiotWithAGun]

I just purchased the game and downloaded it and tried activating and the CD key given to me is apparently invalid. I have tried manually entering it and also changed up all the letters that could have been confused. What is going on?

[djsatane]

Make sure you input the key correctly and dont mess up any digits like 0 with O etc.... otherwise u will have to contact dms/1c. However, since you said you purchased and downloaded the game on steam that means your game is already active and it can be ran except for entering internet gamespy lobby. Make sure the gamespy account you tyring to use with your cd key was not used in past with lets say beta key etc... try creating new gamespy account and tie the cd key to it. Remember that for internet gamespy you need gamespy account login password and then add the cd key to it.

[AceTong]

Where is the CD key located? I just purchased and downloaded this game off Amazon.com and I can't find it anywhere.