I have done this before with two other blogs I run and it worked well. This is really only to offer an e-mail subscription.
I'm trying to do it again with a blog I'm helpding to develop but feedburner can't find a valid XML file. I type the blog address http://parquedozizo.com.br/wp/?feed=rss2 . If you type just that at your browser you will already see an error message, different from a working feed like http://pinkycupcakes.com.br/blog/?feed=rss2
How do I fix this?