Whats up guys. I had a Viper 771XV remote start alarm put on my car a few months ago by best buy. Everything works fine(remote start, alarm sound, locks, etc) however, i noticed that alarm only goes off after open the door when the alarm is on. Like, if i hit the car..the alarm doesnt chirp or go off. I dont know if the sensors are up high enough. I havent litterally beat up the car...but i've pounded it a couple times and nothing happens. Is this normal?