When I did disable my anti-virus software, I also got a message saying my CD key doesn't work. Just as a reminder, I'm running the Steam version of TM2 Stadium and Canyon.
I did eventually got the game to connect via Stadium, but I couldn't change account stuff, like adding in the email I forgot to add, and it couldn't update. Also, choosing a multiplayer server takes forever to get to the server details to join. Apperently, I lucked out on that try, because I then tried Canyon to see if it worked, and to no surprise, I get the dreaded window saying "Couldn't connect to server (12002)"
Is there anyway to make it work besides the things that I have tried up there? There has to be more.
Also, if you comeback saying that you have the same problem, I will shake my head in shame and beat you with a stick.

TomZeBomb