Guys, recent events have led me not to be able to use the car

Iv had a guy out who could not wire up to the ECU and communicate with it (?)
So the car just turns and does not start. Its had a new ign module and it worked perfectly. Iv had a new recon ecu sent to me along with a new immobiliser unit (the part that goes on to the ign barrel)
The mechanic came out again and still could not connect to it
Im stumped. The car is just sat there and wasting away and i really miss driving it
Any ideas?