Ok, I detected a little misconfiguration - unregistered visitors weren't able to post comments, even read them. That is fixed now.
If you're an anonymous visitor (not registered on brielmusik.de) you CAN post comments now, they will move to the "Anonymous poster approval line" from where I can accept or reject them.
If you do REGISTER on brielmusik.de and post comments as a logged in user your comments appear directly on the page instead, no waiting line. :)