3t alarm

94 3.0 M3, BMW immobiliser, changed batteries, on reconnection it won't start? All lights up but wont un-immobilise Anything obvious to check?? Key fob = one button not 2, siren under bonnet says BMW 3T So the advice I've found on web for BMW 3G EWS doesnt seem to be applicable Any help...

Hello all, I recently bought my 328i Sport, but only recieved one key wth it. No alarm fob. A buddy of mine had a similar experience but simply bought a fob, took the glove box out and flicked a switch on the alarm box. Unfortunately, my box of tricks looks different and doesn't have this...