[flexcoders] scrollRect confusion

[Matthew Ganz]

hi. 

i'm loading an image at runtime into an image component. i want the component 
to have horizontal and vertical scrollbars. the image is 300x300 and the image 
i'm loading in is 500x500. i thought i could simply define a rectangle for the 
'scrollRect' property of the image but it doesn't appear to be working. 

am i correct in thinking that i can do this? 

here's the code (init() is called on creationComplete):

[Bindable]
    private var viewPort:Rectangle;
    
    private function init():void{
     viewPort = new Rectangle(0, 0, 500, 500);
    }

<mx:Image 
     width="300" 
     height="300" 
     showBusyCursor="true"
     source="{myRuntimeImage}"
     scrollRect="{viewPort}"/>

any tips are appreciated. - thank you. -- matt.