knock knock sensor
 

i just finished my install today on the zenesis alarm and programed my 4 digit code for my knock knock sensor
when the combo is entered and the keys are not in the car the knock knock sensor will disarm the care and unlock the doors thats all good
but when i arm the car and close the door with the keys inside and try it the combo disarms the car but wont unlock the doors
any help would be great i cant figure it out i think it has something to do with arming the car before closing the door but if thats the case how r u sapossed to make this work?