persistentDataPath not working on iOS. UNITY 4.PRO.

Trying to save replay data to the device. It works on the Editor, works on Mac builds, works on Android. but doesnt work on iOS.

Im on UNITY 4.0.1f2 ..Pro for everything.

Ive read a bunch about the data path issue on the net..but they all say that since 3.3, Unity will add the /Documents path to the iOS builds..

i displayed the filepath on the iOS device when it read/writes and its correct.

/var/mobile/Applications/xxxxx-xx-x-xx-xxxx/Documents/Replay_1.bin

         string dataPath = Application.persistentDataPath;
         string filename = dataPath+"/replay_"+this.gameLevel+".bin";
         Debug.Log ("Loading from DISK!"+filename);
         
         this.myDebug.text = filename;
 
         using (Stream stream = File.Open(filename, FileMode.Open))
         {
             BinaryFormatter bin = new BinaryFormatter();
             this._gameCommandList = (List<GameCommand>)bin.Deserialize(stream);
             stream.Close ();
         }

and for saving..

         string dataPath = Application.persistentDataPath;
         string filename = dataPath+"/replay_"+this.gameLevel+".bin";
         
         this.myDebug.text = filename;
         
         Debug.Log( "Saving to disk!" + filename);
         using (Stream stream = File.Open(filename, FileMode.Create))
         {
                 BinaryFormatter bin = new BinaryFormatter();
             bin.Serialize(stream, this._gameCommandList);
             stream.Close ();
         }

P.S. i tried doing a search on this website..but the server times out :(

so close..yet so far..