ok i'm with ya now. the stick does run to the throttle and from the throttle to pc via usb, a nine pin s vga-ish cable from memory for the stick to throttle connection.
i found with mine that one specific end of the cable had to go to the stick and one to the throttle otherwise the stick was inaccurate. i just put nail polish on the throttle and the "best" end for it.
Shoulda been ok no matter which end was used but twas not the case. can you say "idiosyncratic"
EDIT: Severum, have you been plugging the stick into the mother board via the mouse keyboard ports? if so plug it into the throttle, there is a port on the front, and re test, this would be the cause of the problem if thats what you have done........