Shared Object Problem saving some data but not others

I have a button that is being used to turn the sound on and off. There is a StatsMain class that is used to establish the shared object and the variables. I also have a Settings class that displays the button on/off. The problem I'm having is that the shared object is not remembering the status of the on/off buttons. I'm stumped because I'm using the same process for my game stats (total points, level number, etc.), which works, the only difference is that my game stats are integers and not Booleans.

I tested to see what is inside the shared object using:
for (var prop in gameSharedObject.data)
  {
  trace(prop+" : " +gameSharedObject.data[prop]);
  }
And these are the results. It's saving to the shared object when it is flushed but when I close and open the app the data is not saved.

The code is on Gist:Shared Object Problem · GitHub

How can I fix this?