1. Make sure that your Tap is paired to your device.
2. Open TapManager and make sure the 'Mouse and Keyboard' or 'Mouse Only' is selected.
3. The mouse will not work in direct sunlight. Make sure that you are shaded from direct sunlight.
4. The mouse will not track on surfaces that are glass or are very non-reflective black.
5. The mouse will not work on iOS devices (iPhones and iPads).