[flexcoders] issue with ContextMenu.hideBuiltInItems() not working when mouse is over an embe

[Body Works Studio]

Hi all. I am having a problem with the ContextMenu.hideBuiltInItems()
not working when the mouse is over an embedded image. I am calling
ContextMenu.hideBuiltInItems() by :

private function hideMenu ():void
{
    var cmContextMenu:Object = new ContextMenu();
    cmContextMenu.hideBuiltInItems();
}

and then in my mx:Application tag I have initialize="hideMenu()"

This is removing the zoom play etc options for most of my app, but
when the mouse is over mx:Image tag the right click actually displays
the default contextMenu. 

Does anyone have any ideas?

thanks for your time

Jeff