These are the instructions I downloaded from a ebay site that sells the re-set boxes .....
Read the last comment, I've had to do this most times to get a successful re-set.
Service Indicator Re-Set Tool.
How to use:
²Plug the Device into the OBD2 socket of the car.
²All LED`s will blink and then stay on.
²Turn ignition key to enable the board electronics but don`t start the engine.
²Press the button for the operation you want to perform for 1 second.
²The LED of the chosen operation will light and the other LED`s will be off.
²LED`s will perform a light chain which means the reset is done.
²Sometimes it is necessary to do an inspection reset before an oil reset.