First off, the pedal has a very short 'throw', so there isn't a lot of motion available compared to a full-size pedal like the EV-10. But if you have a zero-function range before it responds, it sounds like you have the wiper on the pedal set incorrectly. Use it to adjust the maximum resistance so the pedal acts continuously.
If this doesn't work, the impedance mismatch is too great, use a different pedal.
------- It's all about the music - really. I keep telling myself that...