Invalid RSS Feed

I installed this wordpress blog at autismcareblog.com. When I try to burn the feed at feedburner.com it gives “Invalid Feed Error”.

http://validator.w3.org gives this error:
Server returned (-3, ‘Temporary failure in name resolution’)

I can view it in my browser.

I don’t have any posts on the blog. Is that the reason?

Thank You,
Sumit.