I have a 2000 Max with the BOSE headunit and bought the AUXNISSv3. I installed it and it works well BUT will not switch AUX inputs. IT STAYS on AUX 1 and will not kick over to aux 2. Is there some special way i should be doing this? I push the up arrow 2 times on my headunit and it does nothing but make the screen flash and stays on aux 1.