Android : Unable to User Selected Sound to Push Notification

Hi I'm working on Push Notification in my app. In that I'm able to get Notification successfully. I'm trying to set user selected sound to Push notification. For that I'm storing user selected sound file path in preferences

 NotificationCompat.Builder  mBuilder =  new NotificationCompat.Builder(this);
    mBuilder.setSmallIcon(R.drawable.ic_launcher);
    mBuilder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.notif_icon));
    mBuilder.setContentTitle(context.getString(R.string.app_name));
    mBuilder.setTicker("Message from " +context.getString(R.string.app_name));
    mBuilder.setWhen(System.currentTimeMillis());
    mBuilder.setAutoCancel(true);
    Uri uri = Uri.parse(CommonUtilities.sp.getString("PUSHNOTIFICATIONTONE", "Null"));
    Log.d("Path: ", uri.toString());
    mBuilder.setSound(uri);

I'm getting exact path in Log as I selected before

09-19 16:14:45.511: D/Path:(17832): content://com.estrongs.files/mnt/sdcard/Ringtones/bbm_tone.wav

Can Any one tell me, where I'm getting wrong??