To use the code provided follow these steps:
Switch on ignition,
hold in central locking button on dash and watch the flashing immobiliser light on the clocks.
Count the flashes to the first number of your code
release when you have reached the right number of flashes and depress again for your second number
when you have entered all 4 numbers the immobiliser telltale light should stay on permanently, now start the car
hope this helps!!!