Problems with RSS feed address?

I’ve got a static home page, (http://walkswithin.com), and my blog is at http://walkswithin.com/blog.

Once upon a time, my feed address was just http://walkswithin.com/feed. Not sure when it changed, but it then it was http://walkswithin.com/?rss2=feed

When I put that last link into my browser window to check it, it just goes to my static home page. Obviously there is a setting wrong somewhere, but I have no idea where to start looking.

The only reason I realized the feed was no longer working was because Networked Blogs is no longer pulling my feed on facebook, and my Google Desktop is not pulling it either. HELP!

Blessings,
Mary