Having trouble with comfort access on our 2011 build e70 x5d.

ista/d shows these faults

00A103 CAS:Immobilizer bus fault
00CF37 Message from car access system to body bus faulty, receiver egs, transmitter something...
002E3D DDE: Interface EWS-DDE

anyone had to deal with this before? I ran diagnostics on the comfort access module and it reads everything ok