izpack custom uninstaller

I am trying to create a custom uninstaller with izpack. I implemented SimpleUninstallerListener to my customuninstaller class and implemented the beforeDelete and afterDelete methods. And tried to create a separated jar for unins开发者_如何学Ctaller. I tried the below row in my xml and add my uninstaller listener class to xml too. But no success.

How can be separated uninstaller created with izpack?