Need help setting up a custom rss feed

I've searched other posts and haven't found help with this.

I'm trying to add a custom rss feed of a blog, but nothing shows in the player.
Here's the url to the feed: http://feeds.feedburner.com/blogspot/jrkAM
I have put that into the url field under custom url, under properties in scene editor.  Any of the preset feeds will scroll in my preview window, but not my custom one.  And of course it won't show up in my campaign in the web player either.

Thanks for any and all help!

Please see this:
http://mediasignage.com/html/signage_video.html?videoNumber=16

The videos are helpful, but they don't address my specific problem of the custom url for my blog feed not being picked up.

My customer wants to update text portions of the campaign nightly, without my involvement, so I planned to set up a feed from her blog.  I have tried a couple of ways to get this in the campaign: I set it up as a scene, and also tried placing it straight on the timeline as a component.

Why does this one work as a custom url:
http://feeds.feedburner.com/thehostingnewscom
and this one doesn't:
http://feeds.feedburner.com/blogspot/jrkAM

OK, now it works when I use the blog feed in the rss format, not the atom format.  I swear I already tried that many times yesterday.

Here's the good one:
http://feeds.feedburner.com/blogspot/aLANy

But hey, I'm happy now.