Help calibrating rudder pedals

[Lwmcg52]

Hello,
I recently bought PFC Cirrus rudder pedals Boeing style, and their Jetliner Yoke to go with my Jetmax B737 cockpit. The yoke works great and has calibrated well using FSUIPC (have the registered version of FSUIPC). However, I am having a lot of trouble calibrating the pedals. FSUIPC recognises the right pedal every time but not always the left pedal. When I try to set values for the pedals I only see the maximum values for each pedal. There is no gradation of numbers. Also I can't set a null zone for the pedals - when centred the value does not change from the maximum value set when the pedal is fully depressed. The toe brakes work ok and calibrate ok but not the rudder pedals. Do you guys have any suggestions for calibrating or do you think the pedals could be faulty?
Cheers
Larry

[KyleH]

Have you calibrated them in Windows yet?

The Windows calibration needs to be done first before anything in Flightsim and FSUIPC.