1. Make sure that you entered in your zip code (step2)  and scanned for channels (step 3) in the settings menu.
  2. You may need to reposition your antenna.  Remember that antennas work best when they are close to a window that faces the direction of the towers. Try repositioning the antenna and running the channel scan to see if the issue is resolved.
  3. You may be in an area where the signals are too weak to be pulled in by the AirWave.  You can try repositioning the antenna but also check to see if you are within the 30 mile range of the antenna by entering in your complete address at http://www.gomohu.com/tv-for-free-front/.