From what I understand, the game requires a joystick to be detected by the game to make it work. So, disconecting the keyboard and getting the same results might indicate that your throttle/stick setup is not working correctly, i.e. a bad wire or pot maybe? Does Windows recognize all of your controll axis properly, and do they function correctly in the calibration/test window? About the only things I can think of, sorry, not familiar with Thustmaster equip.
ts