flex : event when an item is removed from a list

I have a simple list bounded to an ArrayCollection and an itemRenderer.

When I add a new item to the ArrayCollection, I get the event addedToStage: FINE

Trouble is when I remove an item from the ArrayCollection, I never events :
I tried:
remove, removed, removedFromStage** and I need to stop a stream when an item is removed:

So HOW can I get an event when an ITEM is REMOVED ?


Thanks