First check if the server you're playing doesn't ban you for changing dinput.dll and dinput.ini[some servers do that!]Will that be a problem on this server? I've encountered the same error because I tried to change my screen from full to small, and now there are no values in my resolution box. The game will either open in a tiny white box if its a small window, or it will be a black window with a slightly larger white box that eventually disappears altogether if full screen is checked.