99 pontiac sunfire wont start, Anti theft ?

tried Johns method but my theft light does not go out after 10 or even 45 mins. Does it have to go out? The car tries to start then dies as if it is being shut down by the anti-theft fuel shut off. Also the key wont start(or even crank) the car in the start position. It goes to the run position and I use a starter button to engage the starter. The ignition switch is new but this is what the old one did that started this whole episode. Any help would be greatly appreciated.