I cant get my back door to make just the one sound, I have the 4 jumpers connected on the main box but still wont 1 chime does what the front does, the manuel from above says make sure for back door you use 4 jumpers which I have it use to work correctly, but it say it will use the ding which is D4 but if I move the slide to D and put the Jumper on 4 then the front does the ding to is the back suppose to aoutomaticly do the ding regardless of were you have the jumpers in it?