either loose or broken cirkit in key or pressing buton when turning.
you will see on key it has smell slot on to take key apart. put mall screw driver in and take key part off of buttons part, you will now have 2 parts. put key part into ignition and hold buttons part next to key hole and turn the key part to start the car being carefull not to touch the buttons if the car starts and boot stays closed it is the key. if not it its a bigger electrical problem
neil the key maker, April 2009