Last night at the airport I could not load luggage. NOTHING would open the liftgate. Engine is running. All doors are unlocked. Nothing obstructing the liftgate. Three beeps is all that happens with the button on the liftgate or the button on the keyfob. Had to put suitcase on the back seat or risk getting towed. So, today, car is parked in the driveway. Unlock all the doors, walk around to the tailgate, and push the button. Three beeps is all I get. When I push the button on the liftgate, I want it to open, and I don't want to be forced to use the stupid, over-sized keyfob. What am I missing?