I am using a CH FlightStick with FS2k4 and WinXP. It works fine in all aspects until I connect to a multiplayer server with someone else connected (no one else connected...still works fine). Once this happens, the rudder will either deflect full left or full right and I am unable to taxi via the joystick. If i disable the joystick, I am able to taxi via keyboard L/R arrows (not well though..hehe).
Once airborne the joystick works fine.
I am a registered user of FSUIPC and also have downloaded the latest joystick drivers from CH.