I have a Dover solid state with the power, door, car, top & bottom, and intermediate floor cards..issue at hand is that the car is yo yoing so to speak..place car call to 3 it will go to 4 cycle the doors go down to 2 and cycle the doors..then continue to run back and to those floors and never answer 3rd floor car call..I have replaced all cards, added resistor to pc-24d to rid the ac ripple, cleaned all relay contacts etc checked grounds so forth..any insight??