Problem catching events from my ComboBoxItemRenderer

Question

Hi all,
I have a problem catching a custom event dispatched by my
custom ComboBoxItemRenderer. In the renderer I dispatch an event as
follows:
dispatchEvent(new Event("smallTest",true,true));
As this is a bubbling event i expected to be able to catch it
in one of the parent containers. However, the opposite is true.
Then, lowering my goals i tried to catch the MouseEvent.CLICK event
raised by the button in the ComboBoxItemRenderer. I failed in the
same way...
Somebody has a clue? Thanks in advance!
(the following is an isolated description of my small problem
The Mainapp
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
creationComplete="init()" layout="absolute" xmlns:local="*">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.collections.ArrayCollection;
[Bindable]
public var aDataProvider:ArrayCollection = new
ArrayCollection(
[ {label:"one", data:1},
{label:"two", data:2},
{label:"three", data:3} ]);
private function init() : void {
addEventListener("smallTest", doAlert);
private function doAlert(event : Event) : void {
Alert.show("yo");
]]>
</mx:Script>
<mx:ComboBox id="cb" itemRenderer="ComboBoxItemRenderer"
dataProvider="{aDataProvider}" width="200"/>
</mx:Application>
The Renderer
<?xml version="1.0" encoding="utf-8"?>
<mx:HBox xmlns:mx="
http://www.adobe.com/2006/mxml"
width="100%">
<mx:Script>
<![CDATA[
import mx.core.Application;
private function doClick() : void {
dispatchEvent(new Event("smallTest",true,true));
]]>
</mx:Script>
<mx:Label color="red" text="{data.label}"/>
<mx:Spacer width="100%"/>
<mx:Button label="*" width="40" click="doClick()"/>
</mx:HBox>

Answer 1

Listening from the combobox (cb) didn't work. Found out that
the hierarchical parent list from the view of the itemrenderer was
as follows:
List18.ListBaseContentHolder21
List18
[object _ComboboxTest_mx_managers_SystemManager]
[object Stage]
For now, i managed to fix the problem by listening from the
systemManager but this is more like a hack.