dei 451m with 92 silverado?

i am attempting to wire up the door locks on my 92 chevy silverado using a dei 451m and a rattler 369d remote start keyless entry system. The truck has factory power door locks. I found my wires in the left front dash speaker. I cut the light blue (lock) wire and connected GREEN/ black to the switch side of the lock button and WHITE/ black to the motor side of this wire.  I then connected the BLACK/ white (unlock) wire to the blue /black wire on the switch side and BROWN / black to the motor side. I took my PURPLE / black to +12v constant.  Can somebody please tell me what I am doing wrong? These are supposed to be reverse polarity locks. Any help is appreciated. Thank you.