Simple-Press Forum Visibility in WordPress

I’ve installed and integrated a Simple-Press forum into my wordpress site. Problem is, the forum’s topics are only visible when I’m logged in.
Simple:Press: only visible to registered users?, is it right?
please help, i’ve already tried different user permissions, created groups etc, but on the forum page – all topics and counters are visible only after login 🙁

Is there a way to make it visible to guests and casual visitors to the site?