Updating/Changing ViewState properties

I'm having trouble figuring out how to update ViewState-based changes. For example, I'd like to set a spark button component's enabled state to false for a particular viewState in the main application. I've tried numerous approaches to handling the state changes and setting properties explicitly, but I'm clearly not doing it properly, because none of the event handling, aside from the creationComplete event, do anything. If anybody has some suggestions please let me know.
Thanks~Benny

Hey John,
Here's an example:
<fx:Script>
<![CDATA[
//mediaPlayer:VideoPlayer...
import mx.events.FlexEvent;
import mx.events.StateChangeEvent;
protected function application1_creationCompleteHandler(event:FlexEvent):void
     mediaPlayer.fullScreenButton.enabled = false;
     mediaPlayer.fullScreenButton.addEventListener(StateChangeEvent.CURRENT_STATE_CHANGE, stateChangeHandler);
protected function stateChangeHandler(event:StateChangeEvent):void
     if (event.newState == "videoMenu")
          mediaPlayer.fullScreenButton.enabled = true;
     else
          mediaPlayer.fullScreenButton.enabled = false;
]]>
</fx:Script>
<s:states>
<s:State name="audioMenu"/>
<s:State name="videoMenu"/>
</s:states>

Let me know if you have any ideas...
Thanks~B

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