Installed 881xp on 04 tahoe, lil problem

I installed the 881xp into my 04 tahoe.  I installed almost every extra add on module.  It seems  when I remote start the vehicle, the proximity sensor sets off repeatedly and since i have the voice module.  It says over and over "please step back from the vehicle" .  It seems like the motor is interfering with the with proximity and only setting off the voice command.  I dont want to turn down the sensitivity to much on the proximity, but is there a way to wire this so that when i remote start the car the proximity doesn't keep setting off the voice alarm the whole time its running. 

Thanks for your help!

Brandon