Cgs synth

I seem to have everything working on this board,except I the resonance and Frequency pots seem to not be working as they are supposed to. they both have voltage, but the res. pot does not change any tone of the incoming signal. the freqency pot seems to be working as normal, but as soon as I stop moving the pot and leave it as a desired position, it seems to revert to its original position (audibily)