Thrustmaster T500 RS - can't assign buttons, pedals or wheel


I have some trouble with the T500. I have bought almost the entire simbin bundle on Steam by know and all those old simbin games worked fine with my old wheel (Logitech Formula Force GP). But now i can't even assign the t500? I click the axle with my right mousebutton to choose what wheelbutton or pedal i want to use, but it automaticly sets the right mousebutton...for everything, whatever i click to edit it assignes to the right mousebutton...How do i get it to work?

Can i delete some .ini somewhere?