Replacement/Compatible with Transponder Key Blank Fits Chrysler Sebring Convertible with Do It Yourself Programming Instructions (Convertible Model ONLY)

This key was perfectly advertised and works great.

It fits in the ignition, but reading the directions on how to code it, i learnd is very hard, i don't have but one key, and the car is in good condition but no manual came with it when it was purchase, now we have a car in our garage with new keys but it doesn't even turns on, aparently the knew key doesn't react to the computer in the car, the anti theft is still controlling, by not letting the car start, the directions that came with the keys, helps but only if it tells what to do, before you buy the keys! am trying to find out if this anti theft system can be taken off, this car just to use it normally, this is not a ferrari or porche is not even luxurius i wonder why would anyone use a system like that in a car like this.