Viper 5706V Shock Sensor not Working

Hi All, I recently installed a Viper 5706V in my dad's Lexus RX 330. Everything works except for the shock sensor. If I open a door while it's armed, the siren goes off but if I shake the car, even though the sensitivity is maxed out, the alarm does not sound but it will notify me of the shock trigger on my remote when I disarm it. The red led goes on and off when I tap the shock sensor and it is grounding the green and blue wire. I'm thinking I have a defective brain or a setting that I am missing.

This was installed on a 2005 Lexus RX330, although it shouldn't matter. I installed an Avital 5305L in my mom's car a few years back, same system for the most part, same shock sensor and that one works flawless. The sensitivity on the RX is set to max and still won't trigger.