Saving serialized data for iOS

I am trying to save system C# serialized data to iphone. The problem is that it isn't saving data. This code runs perfect on my Android device, but fails on iPhone. Here's the code:

  using System;
  using System.Runtime.Serialization.Formatters.Binary;
  using System.IO;

  private string    filePath = "playerInfo.dat";

  public void Save()
 {
     BinaryFormatter bf = new BinaryFormatter();
     FileStream file = File.Create (Application.persistentDataPath + "/" + filePath);
     
     PlayerData data = new PlayerData();
     data.instructionsCompleted = instructionsCompleted;
     data.totalStarsCollected = totalStarsCollected;
     data.highscore = highscore;
     data.pandaLocked = pandaLocked;
     data.juggLocked = juggLocked;
     data.demonLocked = demonLocked;
     data.pandaTrailActive = pandaTrailActive;
     data.juggTrailActive = juggTrailActive;
     data.demonTrailActive = demonTrailActive;
     
     bf.Serialize (file, data);
     file.Close ();
 }

  public void Load()
 {
     if(File.Exists (Application.persistentDataPath + "/" + filePath))
     {
         BinaryFormatter bf = new BinaryFormatter();
         FileStream file = File.Open (Application.persistentDataPath + "/" + filePath, FileMode.Open);
         PlayerData data = (PlayerData)bf.Deserialize (file);
         file.Close();

         instructionsCompleted = data.instructionsCompleted;
         totalStarsCollected = data.totalStarsCollected;
         highscore = data.highscore;
         pandaLocked = data.pandaLocked;
         juggLocked = data.juggLocked;
         demonLocked = data.demonLocked;
         pandaTrailActive = data.pandaTrailActive;
         juggTrailActive = data.juggTrailActive;
         demonTrailActive = data.demonTrailActive;
     }
     else
     {
         instructionsCompleted = true;
         totalStarsCollected = 0;
         highscore = 0;
         pandaLocked = true;
         juggLocked = true;
         demonLocked = true;
         pandaTrailActive = false;
         juggTrailActive = false;
         demonTrailActive = false;
     }
     Save ();
 }

  [Serializable]
  class PlayerData
  {
      public bool instructionsCompleted;
      public int    totalStarsCollected;
      public int     highscore;
      public bool pandaLocked;
      public bool juggLocked;
      public bool demonLocked;
      public bool    pandaTrailActive;
      public bool    juggTrailActive;
      public bool    demonTrailActive;

}

What I do notice is the first time I load app all my data is right. I am assuming it's running the else statement in Load() method. When I close app, double tap home button, and close out app, and when I reopen it all my data is reset, but I do notice that my booleans that should be true are now false. I believe this is because it is running the if statement in the Load() method, and all my data is returning null. A null boolean is a false statement. Any ideas?