Accuforce pro v2 and Forza Horizon 4 PC

Hi all !

I was able to play with my wheel and pedal with Forza Horizon 4 demo for pc. But now, when i just buy Forza Horizon 4 from Microsoft Store, i cant assign my wheel and pedal. The game recognize the new peripheric but cant assign any key.

Do you have solution please ?
Thanks for your help