fuel sending unit

Hi Tom, spent Monday July 3rd working in installing the Meter Match, I did what you did , I drained the tank with a manual hand pump [had about 3/4 tank of gas] put 1 gal back in, set the Meter Match to #4 and set that as the low/empty spot, then put in 4 gallons more then tried to set that point, the gauge would not move off of the empty set point I tried the up and down buttons but the gauge would not move, when I power up the car the gas needle will move up to the empty mark added more fuel tried it with the next number on the unit nothing happened, then I just filled the tank, and still nothing could not get gauge to move !!, I check all wiring, and then just replaced the wiring from the unit to the sending unit in the tank , all parts are new, sending unit, the gauge is a new VDO unit, I contacted the company Meter Match, Brian thinks the unit may be bad, so he is shipping me a new unit, I hope that works, if not I am not sure what to try next other then take out the sending unit from the tank and test it to sure it is working [check ohms]