All of the posts in that forum originated in 2001. If you have your settings such that you only see posts from the last 30 days... or the last year... or whatever, you're not going to see any of the posts in that forum. When I get a chance, I'll change that feature to pay attention to the last updated date instead of the original posting date. The new post in the forum is a reply to one of the old topics, which is why you're not seeing it.