VDividedBox and TileGroup

[mark goldin]

It looks like if I put a TileGroup into VDividedBox  the content of
TileGroup  is not getting resized.
Here is code:
<?xml version="1.0"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009";
   xmlns:s="library://ns.adobe.com/flex/spark"
   xmlns:mx="library://ns.adobe.com/flex/mx">
 <s:Panel title="VDividedBox Container Example"
 width="75%" height="75%"
 horizontalCenter="0" verticalCenter="0">
<mx:VDividedBox width="100%" height="100%">
<mx:Label text="Add components here" fontWeight="bold"/>
<s:TileGroup clipAndEnableScrolling="true">
<s:TextArea height="200">
</s:TextArea>
</s:TileGroup>
<mx:Canvas label="Canvas 2" width="100%" height="100%"
backgroundColor="#99CCFF">
<mx:Label text="Add components here" fontWeight="bold"/>
</mx:Canvas>
</mx:VDividedBox>
</s:Panel>
</s:Application>

Do I need to adjust it manually?

Thanks