Bug in xWiki in exo?

I deployed xwiki 0.9.840 in eXo 1.0.1. To customize the wiki, I created the eXo user Admin/admin and created two Categories. (See http://193.196.117.26:8080/portal and log in as Admin/admin) Now I wanted to create a new entry in the category "Biography" so I clicked on "Biography" in the left menu and added the title of the new entry and clicked "Add this news". This resulted in a "not found" error, simply because the button invoked http://193.196.117.26:8080/inline/Main/PageName?parent=Main.WebHome&tem… which doesn't exist. The same happens when I click on any of the blue tabs in the top of the wiki. For instance, "Home" refers to http://193.196.117.26:8080/view/Main/WebHome even though the real web home of the Wiki is located at http://193.196.227.26:8080/portal/faces/private/Admin/home/community/wiki.W… When I click on "WebHome" in "Recently visited" on the right side, it works. So I am wondering: how can I create a new news item? Anything? Does it have to do with the "Root space name" which is by default set to "Main"? Thanks s.