Start your car and wait until the car is semi warm. Doesn’t have to be completely warm, just near the idle drop before the VSC system will accept data. If your car has been running at all in the past few hours everything should be pretty instant and ready to go.
Press and hold the button for 1-2 seconds until the traction lights on the dash appear. If nothing happens the VSC system isn’t ready to accept data yet or you’re rolling. Make sure you’re sitting at a stop.