This is what I would do, connect a battery charger to batt and turn onto lowest charge position, this will ensure battery doesn't go flat.
Turn the key to position two (all lights come on in cluster), and then turn back off and remove key. Do this 20 times, how many times did you get the dreaded alternating green and red flash??. If "0" you may have to try another 20 times, but first, hop out of car, close the door and lock/unlock car.
Make sure you note down exactly each turn of the key and what the result was.
Once you have done this, post back the results and I will tell you what to do next.