Dispatching & listening for custom events from custom component [Flex 4.1]

I'm giving this a try for the first time and I'm not sure I have the recipe correct!
I have a custom component - it contains a data grid where I want to double click a row and dispatch an event that a row has been chosen.
I created a custom event
package oss
    import flash.events.Event;
    public class PersonChosenEvent extends Event
        public function PersonChosenEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false)
            super(type, bubbles, cancelable);
        // Define static constant.
        public static const PERSON_CHOSEN:String = "personChosen";
        // Define a public variable to hold the state of the enable property.
        public var isEnabled:Boolean;
        // Override the inherited clone() method.
        override public function clone():Event {
            return new PersonChosenEvent(type);
Then I try to dispatch the event within the component when the datagrid is doubleclicked:
import oss.PersonChosenEvent
dispatchEvent(new PersonChosenEvent(PersonChosenEvent.PERSON_CHOSEN, true, false));
And in the parent application containing the component I do on creationComplete
addEventListener(PersonChosenEvent.PERSON_CHOSEN,addPersonToList);
The event does not seem to fire though. And if I try to evaluate the "new PersonChosenEvent(..." code it tells me "no such variable".
What am I doing wrong?
(It was so easy in VisualAge for Java, what have we done in the last 10 years?? )
Martin

I've done this kind of thing routinely, when I want to add information to the event. I never code the "clone" method at all.
Be sure that you are listening to the event on a parent of the dispatching component.
You can also have the dispatching component listen for the event too, and use trace() to get a debug message.
I doubt if it has anything to to with "bubbles" since the default is true.
Sample code
In a child (BorderContainer)
dispatchEvent(new ActivationEvent(ActivationEvent.CREATION_COMPLETE,null,window));
In the container parent (BorderContainer)
activation.addEventListener(ActivationEvent.CREATION_COMPLETE,activationEvent);
package components.events
    import components.containers.SemanticWindow;
    import components.triples.SemanticActivation;
    import flash.events.Event;
    public class ActivationEvent extends Event
        public static const LOADED:String = "ActivationEvent: loaded";
        public static const CREATION_COMPLETE:String = "ActivationEvent: creation complete";
        public static const RELOADED:String = "ActivationEvent: reloaded";
        public static const LEFT_SIDE:String = "ActivationEvent: left side";
        public static const RIGHT_SIDE:String = "ActivationEvent: right side";
        private var _activation:SemanticActivation;
        private var _window:SemanticWindow;
        public function ActivationEvent(type:String, activation:SemanticActivation, window:SemanticWindow)
            super(type);
            _activation = activation;
            _window = window
        public function get activation():SemanticActivation {
            return _activation;
        public function get window():SemanticWindow{
            return _window;

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