Need help adding podcast links to Podcasts app
 

I am having some challenges adding these podcasts to the player. They are the RSS/xml links which seemed to have worked with other podcasts.

Looking to get these to work:
ESPN: The Michelle Beadle Podcast
ESPN: The B.S. Report with Bill Simmons

These ones do work:
FFToolbox - Fantasy Football News & NFL Rumors | Blog Talk Radio Feed
Boomer & Carton

What am I doing wrong here?

Any help would be great.