Push notification not showing when app is in running in cordova

I have successfully implement the push notification using (https://github.com/phonegap-build/PushPlugin) in cordova.Everthing works correctly except that push notification is not showing when the app is running(ie foreground).Here is the code

case 'message':
        // if this flag is set, this notification happened while we were in the foreground.
        // you might want to play a sound to get the user's attention, throw up a dialog, etc.
        if ( e.foreground )
        {
            // if this flag is set, this notification happened while we were in the foreground.
            //this is not working
            if(e.foreground){              
                var myMedia = new Media("/assets/www/img/beep.mp3");              
                my_media.play();
            }else{
               // otherwise we were launched because the user touched a notification in the notification tray.
            }
    break;