Listeners keyDown are not being called when keyDown in an popup l

Question

For some reason the listeners titleWindow_keyDown are not being called when keyDown in an popup like so:
<?xml version="1.0" encoding="utf-8"?>
<s:SkinnablePopUpContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
                           xmlns:s="library://ns.adobe.com/flex/spark"
                           xmlns:mx="library://ns.adobe.com/flex/mx" width="400" height="300"  keyDown="titleWindow_keyDown(event);" >
    <s:TitleWindow title="Edit Complaint" close="close()">
private function titleWindow_keyDown(evt:KeyboardEvent):void {
                    if (evt.charCode == Keyboard.ESCAPE) {
                        close();
Any ideas friends??

Answer 1

But in my code it is a child inside SkinnablePopUpContainer:
<s:SkinnablePopUpContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
                           xmlns:s="library://ns.adobe.com/flex/spark"
                           xmlns:mx="library://ns.adobe.com/flex/mx" width="400" height="300"  keyDown="titleWindow_keyDown(event);" >
    <s:TitleWindow title="Edit Complaint" close="close()">