Hi, 

I googled for it and yes exactly like this one but I get 'The requested document could not be found' on my wiki. Any idea why it's not supported in my xwiki.

Did you import the default XAR available for download at : http://www.xwiki.org/xwiki/bin/view/Main/Download#HXWikiEnterprise ?

To retrieve the page, download the XAR, go to administration > import, add the file to the page, click on its name, uncheck all boxes but the one marked Main.AllDocs and import it. This will recreate the doc in your wiki. 

Guillaume