Custom Events using VIJAVA

I am creating one custom event using VIJAVA APIs.

While posting that event, I want to change the source of that event or the message of that event.

I can change the message using following code but web client is not showing my custom event.

  ManagedObjectReference eventManager = serviceContent.getEventManager();

  ExtendedEvent myEvent = new ExtendedEvent();

                GregorianCalendar cal = (GregorianCalendar) Calendar.getInstance();

  myEvent.setCreatedTime(DatatypeFactory.newInstance().newXMLGregorianCalendar(cal));

  String userName = "vcenter.service.instance.user";

  myEvent.setUserName(userName);

  myEvent.setMessage("Trial Event message" + id);

  myEvent.setEventTypeId("Module-1");

  myEvent.setManagedObject(serviceContent.getRootFolder());

  myEvent.setFullFormattedMessage("FullFormat: Module-1 Trial Event message " + id);

  vimPort.postEvent(eventManager, myEvent,null);

But I can't see my event in web client, I don't know what I am missing here?

Any help would be appreciated.

Thanks in advance.

Regards,

Bhushan