Alarm system makes itself independent

Hi people have a question today about the alarm system carguard defender standard key. I have built this already a long time ago and since that always already problems with the pre-alarm. it triggers at least once a day, without that even anything is close. it must be on the vibration sensor, because if the is switched off, the disturbance does not occur. of course I have already controlled the sensitivity down to the impact and yet the system is so vulnerable. before in I just knocked on the small wheel cap at the back left very easily, and she went off. well that doesn’t matter. worse is the thing that this thing triggers, although nothing is near. and that’s mainly because of the neighbor’s crap and you can never leave the car without a dull feeling in the magen anyhow at night. do you have that sometimes? what can I do? are there some creepy waves in the game or something wrong? please help me, because it just always annoys the sensor to turn off, where it can actually be very useful. for example, if someone completely knocks the door against my car. you should all snap in.