You haven't written a blog post yet. The RSS feature is probably only be available for actual blog posts.
Create a blog post. Once you have it up you should see an "RSS" button giving you the feed address. At a minimum it'll be easier to troubleshoot once you actually have a blog posted.
When I go to your page there are "wall posts" but no actual blog posts (look at the navigation on the left hand side, "Blogs" is grayed out, meaning no blog posts).