You have a wordpress.COM account and are thus at the wrong support forum!
You should be at: http://en.forums.wordpress.com/
It's a very common misunderstanding! :D
Also, you need to start posting content for your RSS feed to work! Everything looks fine on your feed setup, it will work once you develop content. RSS isn't meant to be viewed directly/in-browser, it is meant to provide content to RSS readers
