For several months, I have had problems with key fob not locking/unlocking power doors or opening rear hatch. I changed the batteries in both fobs and continue to have this intermittent problem. Yesterday, the key fob would not function at all. Rear hatch would not open with fob or when depressing switch on door due to it being locked. I used the key to enter the vehicle ( alarm went off as when I always have to unlock it in this manner), inserted key into ignition, alarm went off. Started car. I then attempted to open the rear hatch with the overhead button, but nothing happened. Turned ignition switch off and on 3 times; nothing. I then placed car in reverse, backed up about 4 feet, put it back in park and viola! All of a sudden the overhead switch opened the rear hatch. What is going on?