I think you are right - your posts are still on moderation. You could read that forum as a guest, but not post in it. As a member, you need to become part of the community before being allowed access to it, because now access means that you can post in it as well as read it. So you need to be here long enough (and have posted enough sensible messages) to show you are not going to start posting spam.
So look around and make some posts on other threads...
[Edit - odd, I've just logged out and checked, and as a guest I can't see that forum at all - maybe it changed in the recent shuffle?]