Please check the following:
- VZ-1 HD is plugged into your computer via the included USB cord.
- The latest Presenter software is installed and running.
- Ensure you have pressed the power button on the front of the stand.
If you've tried all of the above yet the problem still persists, please unplug the camera, exit the software, restart the software, and replug the camera. Then, press the power button again.