Mixture and Prop pitch mappings?

[Plt Off JRB Meaker]

I have gone back to the Blenheim IV for a while and have been setting up my controllers for flying it.

As I always fly CEM I have mapped a Saitek throttle quadrant to act as my mixture controller.I map in the Axes section Mixture 1 and 2 and have the controls both working correctly so I can graduate them from min to max.

However,when I try to operate them in the sim,they're either off or on there is no graduated position,I need to set the mixtures both at 50% but can't,can anybody tell me why,or where I may be going wrong because it's baffling me.

The prop pitch controls are the same.