Book Me + Adsense = Compensation ???

Several months ago I decided to offer Book Me for free to those that wanted to use it and make traveling with Southwest just a bit more friendly to the occasional traveler. My thinking was that if the program did its job, the user would be happy, visit my website from time to time, and Adsense would take care of my compensation. After several months of thinking this, I can say that my vision did not come to fruition. That leads me to believe that my user base doesn't like my program, or Adsense does not generate ads for my site that generate clicks. What say ye user base? Is it the program or Adsense? You make the call...