Sorry for not getting back sooner I've been away for a couple of weeks.
I've found the problem! One of the cables on the small white plug on the back of the Head unit was just out of the plug. probably shifted it when I slid the unit out early doors . May be of use to someone if it happens again somewhere? I've got to sus out how the voice commands work now! Thanks again for your help and patience with this. Joe
I used the incorrect software first and then changed to the ST software when it wouldn't work. I did use the ELM Setup and press Setup ELM327 for MS-CAN bus.The music is fine and cuts out for "calls" just no audio on the voice/ phone.