If the gesture control attribute isn't working, it may be that it's been deactivated in the app. After you connect your glasses to the ActiveLook app, go to the third tab and check that the gesture sensor is activated. If it's been disabled, enable it.
If the problem persists, try turning off your glasses and then turning them on again once the sensor is enabled.
Your gesture sensor may also be dirty. Ensure you clean the outer surface of your lens so that sensor can detect your hand.