Nothing on RSS feed

Hi there guys/girls

My feed by category shows nothing… I have permalinks activated and when i put the feed: http://www.admit.com.br/category/podcast/feed on my browser to its content I got nothing. 🙁

I have a podcast here:
http://www.admit.com.br/category/podcast/feed

But nothing shows up in the browser.

Can anybody help me?

Thanks a lot!