i have just brought a bmw 318is e36 coupe and the ignition barrel needed changing so i done this. however as the key was diferent to mine and wouldnt work with the imobiliser i had to mount the immobiliser coil some where else and every time i start the car i used to have to put the old key in the middle of the immobiliser coil and turn the other key this worked for a day. but next day went to start it and it wont start the immobiliser is oviously not diactivating. i have put a diagnostic pc on it and it read key 1 unidentified. what can i check to see if its working and is there an easy way around this.