iTunes Not detecting episodes

[MuseumsPodcasting]

Greetings all,

I'm very new to this RSS feed podcast shindig. I followed the
instructions on the iTunes website, http://www.apple.com/quicktime/tutorials/videopodcasts_win.html.

I've set up a blog, to which I'm posting my videos - http://museumcenter.blogspot.com/.

I then went through the feedburner set-up to create an RSS feed to
this blog, just pulling the video files when they pop up.

From the Feedfinder website, I then selected what it calls the
"Original Feed," which is http://museumcenter.blogspot.com/feeds/posts/default?alt=rss,
and pasted it into the iTunes podcast submission box.

When I do so, I get the error message "The feed has no episodes."

However, the blog most certainly has posts with videos.

What step am I missing? Any help would be appreciated.

~Ben