Well I think I have discovered the problem with the EAS unit as to why the compressor would not run, it looks like the Air Presure switch was at fault, as I made up a 2nd EAS unit (plenty of spares ) and then put this in the car and the compressor ran, I know that this unit has a leak on the rear left valve. But it was working, so then what I did was then changed the valve box and left the air presure switch and control unit as I know it was ok, put it all back in the car and it's all working and by the looks of things the car is staying up, BUT now because we have messed around with the fusebox anc the relays I now have a message saying Air Bag fault, so something else to sort out. Lets hope this is the last for a while, as I have just got myself a Hawk diagnostic unit would that clear this air bag fault.