Recently I was working on a project that I was using MouseEvent.DOUBLE_CLICK and the darn thing wasn’t firing no matter how many times that I’ve clicked on it. After awhile I remember that most  Flex component actually have a doubleClickEnable property . Guess what was the result of the trace when I did

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trace(image.doubleClickEnabled) // this will return false

The simple solution for getting MouseEvent.DOUBLE_CLICK to work is to ensure that you set the property of doubleClickEnable to true

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image.doubleClickEnabled = true;
image.addEventListener(MouseEvent.DOUBLE_CLICK, double_click);