Help with PO-170 keyboard/synth

I was given the PO-170 as a gift recently and I have experienced a slew of issues getting it to work. TE has sent me a replacement power and battery pack. I now have a working signal from the patches on the module itself, but when I try to patch to the keyboard/synth there is no difference in tone or octave from the keyboard. Am I missing a step? Possibly another faulty part? Any tips appreciated.