I am going to guess here but I think you have a permissions issue.
I registered at your site and I see two problems.
First is a registered user can only see about three forums. None of which can be opened by a registered user un less they subscribe.
When I try to subscribe I get a error that I did not select a payment method but none are offered.
When I visit my feeds none of the forums are there to view except for the basic three PM , recent topics. recent posts.
They don't work either because I don't have access to the forums.
So I think it is a permissions issue that since I have not paid for membership it is blocked by a permission issue.
And by permissions issue I mean by the group management options in the control panel not the file permissions.
