do you get a message saying you have no access to that page as well???
if so it seems to be one of the little idiosynchracies of this site and not much you can do about it
just click on "forum" up near the little "home" sign and it will open a new page with all the different areas you can post different stuff to.
if you just want to read whats been happening then click on "todays posts" and it will show all the latest posts on different threads!