protected void fireReceiveDataEvent(ReceiveDataOnServerEvent evt) {
    if (receiveDataOnServerListenerList != null) {
      Object[] listeners = receiveDataOnServerListenerList.getListenerList();
      for (int i=0; i<listeners.length; i+=2) {
        if (listeners[i]==ReceiveDataOnServerListener.class) {
          ((ReceiveDataOnServerListener)listeners[i+1]).OnReceiveDataOnServerEvent(evt);
        }
      }
    }
  }