Last evening I tested my Digitrax Zephyr for the first time using a QSI equipped P2k SW-8. I was successful in programming the unit but when it came time to move, the units sound increased with the control knob but it would not move. I programmed and tested and Atlas unit(non sound equipped) with no problems. Any help would be appreciated. I apologize if this has been covered before. This is the first time I have posted to this forum. AFN