[flexcoders] Help with ViewStack Event Listeners for Custom Components

[Craig]

My Viewstack does not make custom components active (they do not show
up with simple functions like this one... 

vwChrt.selectedindex=0;

vwChrt.selectedindex=1;


I suspect I need to add Event Handlers, and would like some guidance.

My MXML code looks like this (shortened) - A viewstack surrounding two
custom components (panels)

        <mx:ViewStack id="vwChrt"
                    creationPolicy="queued" >

        <mx:Panel id="lgCh" label="Long" 
                width="100%" height="100%">
        <comp:Charts id="Chart"
                 creationPolicy="queued">
        </comp:Charts>
        </mx:Panel>

        <mx:Panel id="shCh" title="Short"
                width="100%" height="100%" >
        <comp:ShortsChrt id="ShortChart"
                 creationPolicy="queued">
        </comp:ShortsChrt>
        </mx:Panel>

        </mx:ViewStack>

I am not sure how to use the following event listeners.
                
vwChrt.getChildAt(0).addEventListener(FlexEvent.CREATION_COMPLETE,
getLong);                       

vwChrt.getChildAt(1).addEventListener(FlexEvent.CREATION_COMPLETE,
getShort);                      

Can anyone offer any advice?
Thank you in advance for any help.
Craig