Custom Events cannot be named “CLICK”

I encountered this error while trying to create a custom event for a check box UI control:

TypeError: Error #1034: Type Coercion failed: cannot convert flash.events::MouseEvent@5658bdf1 to com.cannedbanners.ui.SizePanelListItemEvent.

I had created a custom event class and named one of my events “CLICK”, because that’s what the event was. For some reason, it throws the above error because it thinks your trying to force a mouse event into a custom event. I renamed it to “CLICKED” and everything was happy again.