*SOLVED* Chromatic Pitch - Voice2 knob doesn't work....

i played around with the pitch shifter fx today....after turning the amp on yet again i noticed that the pitch doesn't change at all when i am turning the voice2 knob in any direction...the display shows as normal, but sound doesn't change...Voice1 works perfectly though...any ideas on why?? thanks

thank you! *SOLVED* - it Voice mix was at -5....set it to 0 and now its ok again!! thanks!!