[rules-users] ResourceChangeNotifier and subscribeResourceChangeListener()

I am using Guvnor and have configured a change-set.xml to look towards http://..../LATEST. I would like to add a listener to ResourceChangeNotifier that will respond to detected changes. I implemented the ResourceChangeListener interface and have added it via the subscribeResourceChangeListener() but my resourcesChanged() function never seems to be called. I'm wondering if my assumption and usage of everything is correct... Thanks, Andrew