Lazyhood

I just bought FBV Express MK2. All setup is complete, but the WAH/VOL Pedal is not working. The other buttons are detected and worked in FL Studio. But, the WAH/VOL pedals are not detected in the FL studio and didn't work. I tried changing all of the value setting of the FBV Control application "Mod wheel, Expression, Channel volume" but it didn't work as well. How can i setting this board? Please help... I'm sorry I'm not good at English, I used the translator