Thanks to @not-fishing - info on key re-programming;
You'll have to enter the code three times to a single key memorized by the ECU. The other thing that was a shock was you need to have all the keys with you at the time because you have to insert each key when the ECU asks for them (in 20 seconds). I didn't have one old key and sure enough it wouldn't work until I redid the CPU with all three keys.