I dont have Fanatec too.When u say useless u mean doesnt work at all?
Also when u change values in the "view" tab ingame,then when u go out of pits check if ur wheel is clipping.
U can see that down on the left,its the grey bar.(press f8 if u dont see it).
The grey bar has to go on top when u go only over kerbs and not when u turn for example...cant help more sry