[dil6222]

Hello hope this will help 

all security codes and vin must be same in all units 

Check security wait time is inactive in immobilizer.

and yes it you reset it will accept any new pin but needs to match all other units.

if you still can't program key it means immo and ecu need resync to do this
reset ecu and immo the go on program immo there should be a option to program click on new ecm and immo installed from the drop-down box.

Then key should program correctly if you have opcom use 1.59 firmware

We will all help till solved