Neunreither, Isabelle writes:

.... All links have been then correct, only after clicking the logout link, i was asked to give my passwort. i gave my passwort, clicked of ok and get following message: connect failed. Then i clicked of cancel and saw in my management interface i'm logged out. Did somebody have the same problem? That is normal behaviour.

Some hackery is necessary to convince your browser to no longer send your id and password (that's what logged in means with HTTP basic authentication). Zope's logout page uses "<dtml-raise Unauthorized>" for this hackery. You will get an "unauthorized" whatever you give as user/password. But most browsers forget the old login information after you gave them once a new one (which, of course, fails too). You may read the "Web Publishing" section of URL:http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html if you want to learn more about basic authentication. Dieter