Went digging in my favourites folder & found this, this is where I found how to get my key working again.
http://www.electronhacks.com/2012/10...-entry-remote/
there instruction for jeep
JEEP
1. Enter your Jeep and make sure all of the doors and the trunk are closed.
2. Put your key in the Jeep’s ignition and keep the key in the off position.
3. Open the driver’s door on the automobile and leave the door open.
4. Move the switch on the door to the lock position while the door is open.
5. Switch the key in the ignition two clicks to the right to the “On” position.
6. Press the lock button on your keyless remote for your Jeep and hold the button for 5 seconds. Release the button and remove the key from the ignition to complete the programming.