I have bought mount and blade warband on CD and napoleonic wars on steam. At some point in time i uninstalled it. Recently when i reinstalled it the multiplayer does no longer work. When i try to connect to a server it displays a pop up window saying "unable to connect to server". Seconldy it says my steam CD keys are invalid, when try to do "add a game" on the steam homepage, does that mean my CD keys are expired, or something else?