I was about to type to you that you might be using the wrong key. It happens all the time with me. Last time it happened it was on a Cadillac Eldorado I had just purchased brand new, I believe it was a 1993, but anyways I was in front of Whiskey Petes casino where the valet had just drove the car up and handed me the keys. When I got on the car I inserted the wrong key and the computer shut the car down to where it would not crank or do anything for two hours thinking somebody was trying to steal the car. I felt stupid waiting for that darn computer to let me drive off. So it does happen.