[xwiki-users] No 'Edit' in on-line sandbox?

Hello, Before installing XWiki, I wanted to play around in the Sandbox some to see if it meets our requirements. http://playground.xwiki.org/xwiki/bin/view/Sandbox/TestPage1 states: Click on "Edit" and modify the contents of this page, then click on "Save & View" to see how they look like on your page! But there is no 'Edit' menu or button to be found. And yes, I registered and logged in. Even tried different browsers to make sure it isn't some pluggin I installed. Is this supposed to work? Kind regards, Herta -- "Life on Earth may be expensive, but it comes with a free ride around the Sun."