did you Calibrate the joystick, The pc might not reconknize it, so you have to Do all the settingd yourself..
THe pc thinks that when je joystick is positioned in the middle, It's pointing down..
Just go to Configuration screen
then "Game Controle" Or anything close ( I got dutch xp..)
Then Create a new Joystick configuration, and all that crap
if you havent done that yet, Thats the prob ^^