When I try to launch 'LaunchIW5M', it says, "Error Initialization: Your current Steam account does not own Call Of Duty: Modern Warfare 3. Please purchase the game, or try it on another Steam account or make a folder called 'dw'." eventhough I've already purchased the game before, with retail. When I try it on my friend's account, it works, but I'm trying to figure out why doesn't it work on mine. Any help would be appreciated. Thanks.

Buy the game or CREATE A FOLDER NAMED DW.

just make folder named dw in mw3 folder?

but my friend's account works fine without it? O.O ah nvm, I'll give it a try.