Make XUL application visible

Hi

I am using Java XPCOM and xulrunner-1.8.0.4. Im trying to embed
xulrunner in Java, as I am sure many people are. I seem to be stuck, I
believe my Java code is starting xulrunner correctly, but I see no
visible window. Should the window be visible?

The code:
		// First, get the event queue service. This handles all event queues
in
		// XPCOM.
		nsIEventQueueService eventQueueServive = (nsIEventQueueService)
serviceManager
				.getServiceByContractID("@mozilla.org/event-queue-service;1",
						nsIEventQueueService.NS_IEVENTQUEUESERVICE_IID);

		// Next, we want to get the UI thread, since we want to open a
window.
		// There is a static variable on the
		// nsIEventQueueService that contains the id of the special UI event
		// queue.
		nsIEventQueue eventQueue = eventQueueServive
				.getSpecialEventQueue(nsIEventQueueService.UI_THREAD_EVENT_QUEUE);

		// Now create a proxy for the proxy object manager.
		nsIProxyObjectManager proxy = (nsIProxyObjectManager)
componentManager
				.createInstanceByContractID("@mozilla.org/xpcomproxy;1", null,
						nsIProxyObjectManager.NS_IPROXYOBJECTMANAGER_IID);

		// and use the proxy object manager to create a proxy for the
		// nsIWindowWatcher instance we created above.
		nsIWindowWatcher windowProxy = (nsIWindowWatcher) proxy
				.getProxyForObject(eventQueue,
						windowWatcher.NS_IWINDOWWATCHER_IID, windowWatcher,
						nsIProxyObjectManager.INVOKE_SYNC);

		// now we use the proxy to call the method as usual.
		nsIDOMWindow domWindow = windowProxy.openWindow(null,
				"chrome://myapp/content/main.xul", "bob", "centerscreen", null);

Cheers
Greg