I can open the LiveZilla Server URI in my webbrowser while the Server Test fails all the time.
Answer:
If you are able to view the LiveZilla Server Page in your webbrowser while the Server Test fails all the time you may have a forwarding on your webserver which redirects from http://yourwebsite.domain/livezilla to http://www.yourwebsite.domain/livezilla. That means that you just have to add a www to your server url in order to pass the Server Test.
