I just bought this  Maxicom 808S and am trying to reregister a new battery to the BCM.  It starts the process then finally gives a message that it cannot communicate with the BCM.  I’ve tried multiple times with no luck.  I’ve tried with the ignition in the accessory position and with the car running with the same results.  It is a 2019 Lincoln MKZ.  Anyone have any info on this?  Thanks.