So i've had my viper car alarm installed for a few years now, and I recently noticed that alarm will not trip. I remember when it was new, it was fairly sensitive. Now, I can beat n bang on the windows, doors, etc... and the alarm never trips. The only thing that will trip the alarm is if I open my door using the key. I have not adjusted or touched the alarm in the past til recently. I adjusted the sensitivity all the way up and still the alarm does not trip. Has my alarm brain gone bad or something?