Sometime my app crashes because of MediaSound object management.

Target OS: Android

Titanium SDK: 3.2.2GA

Hi, I wrote a little game. There are 12 buttons and each button, when touched, reproduces a little mp3 file. I use a mediaSound object:

var effetto = Ti.Media.createSound({});

and the function called when a button is touched is:

function effettoSonoro(obj){
            effetto.reset();
            effetto.release();  
            if(obj=='endGame.mp3'){
                effetto.url = 'audio/' + obj;
                effetto.play();         
                effetto = null;
            }
            else{
                effetto.url = obj.suono;
                effetto.play();     
            };
 
    };

I'm going crazy because I'm not able to solve my problem: sometimes in a very random way my app crashes when a button is touched and this is the error log:

[WARN] :   dalvikvm: threadid=17: thread exiting with uncaught exception (group=0x40015560)
[ERROR] :  TiApplication: (Timer-31) [31313,469145] Sending event: exception on thread: Timer-31 msg:java.lang.IllegalStateException; Titanium 3.2.2,2014/03/05 12:22,96e9a07
[ERROR] :  TiApplication: java.lang.IllegalStateException
[ERROR] :  TiApplication:   at android.media.MediaPlayer.isPlaying(Native Method)
[ERROR] :  TiApplication:   at ti.modules.titanium.media.TiSound$2.run(TiSound.java:516)
[ERROR] :  TiApplication:   at java.util.Timer$TimerImpl.run(Timer.java:284)
[ERROR] :  AndroidRuntime: FATAL EXCEPTION: Timer-31
[ERROR] :  AndroidRuntime: java.lang.IllegalStateException
[ERROR] :  AndroidRuntime:  at android.media.MediaPlayer.isPlaying(Native Method)
[ERROR] :  AndroidRuntime:  at ti.modules.titanium.media.TiSound$2.run(TiSound.java:516)
[ERROR] :  AndroidRuntime:  at java.util.Timer$TimerImpl.run(Timer.java:284)

Is there anyone able to help me fixing this issue? Thanks for the attention.