Assetto Corsa Neck FX not working

[Ref1exa]

So my problem is that I have already activated the neck FX and made the best settings and it's not working. When I try to look around with my keys it doesn't look left or right (sorry if you don't understand me but my English is not the best at all). What should I do and how can I fix it?

[silvanob2]

did you assign the keys ?

[Ref1exa]

Originally posted by silvanob2:

did you assign the keys ?

Yes I assigned them but nothing is working :(