this may not be what you're talking about... but if it is it could save you some hassle...
could it be that your steering wheel is just locked up?
i know with my car sometimes if i had turned it a weird way when shutting off the car, it will lock and i wont be able to put the key in all the way to start it
so you have to wiggle and pull the steering wheel as you put the key in, and it should 'click' and unlock letting the key in, and you should be able to start it.
/f