[flexcoders] Transitioning a popup?

[criptopus]

I have the following code:

<mx:states>
        <mx:State name="openRight">
                <mx:SetProperty name="width" value="670"/>
                        <mx:AddChild relativeTo="{controlbar1}"

etc.

And I am trying to get it to transition to and from this state using...

<mx:transitions>
        <mx:Transition id="myTransition" fromState="*" toState="*">
                <mx:Resize duration="400" target="{this}"/>

I think I have the targeting wrong, any ideas as to what it should be or where 
I am going wrong?

- Stephen