How do I get my podcast feed created?

I have a wordpress site. I added a plugin to create podcasts. It is the Blubrry PowerPress plugin. Then I uploaded an mp3 to my site. Then I used to plugin to display the podcast.

Here is an example page where the podcast is, at the very bottom.

But when I go to this url to find my feed: http://glowingstart.com/feeds/podcast/

I get a 404-error.

Would anyone know why that happens? And how do I determine whether my feed url has been created and the feed updated?

Thanks!