I am following the "InfoWindow on MouseOver" example from the ArcGIS API for Flex Samples page. I have added event listeners for MouseEvent.MOUSE_OVER events as described but when I mouse over the graphics of the FeatureLayer my application never goes into the handler function when I run it in debug mode from Flash Builder (Flex 4), which I assume means that either 1) no event is being dispatched when I mouse over the graphics of the layer, and/or 2) for whatever reason the event is not being handled by the function registered as the listener for the event. How can I determine where the problem lies? Is there perhaps a set of requirements which services must satisfy in order to function as a FeatureLayer as described by this example, and if so where is this documented (i.e. perhaps there's something amiss with the MapServer service I'm using)? Can anyone suggest why I don't get a mouse over event when I mouse over the points of the layer?
Thanks in advance for any suggestions, etc.
--James