[xwiki-users] A question on Skin Extensions (not working)

I tried doing exactly what I see in this tutorial: http://platform.xwiki.org/xwiki/bin/view/DevGuide/SkinExtensionsTutorial to to the Minimal StyleSheet eXtension. I do everything as the tutorial says but there is no effect. So is the tutorial wrong or does the option "Always on this wiki" not work? I can do: {{velocity}} $xwiki.ssx.use("XWiki.MyFirstStylesheetExtension") {{/velocity}} In a page and have it work, but I want to have an extension for all of the Wiki so I want to use the "Always on this wiki". Thanks for any pointers one might give. Brett