I bought the GTA complete pack, Episodes from Liberty City worked fine, I can right click the game in steam and click "view CD-Key." now I'm trying to play GTA IV, but there is no CD Key anywhere, and when I try to launch it, the rockstar activation thing comes up and tells me "Activation process has been terminated. The SERIAL was not found in the database. Most likely the SERIAL has been entered incorrectly." But there is no CD-Key anywhere. Is this a problem with GTA IV for steam, or am I missing something here?