Why does the alarm on my 03 Impreza WRX always go off if I try to open the door or trunk with the key. I always have to unlock the car with my keyless entry. This is not a major problem but I am just wondering if I am doing something wrong. Usually I open the car with the keyless entry but today after a round of golf I tried to open the trunk with the key and set off the alarm and had several people in the parking lot look at me as if I was stealing the car.