Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
With your good key, can you turn the ignition on for 5 seconds, then off for 5, about 3 times.
Then see if it now starts.
If this didn't work, you will need to get the vehicle t o your local Ford dealer for further diagnosis.
System communication fault could be immobilizer or one other module that needs to talk to immobilzer at ignition on.
Hope this helps