FeedWordPress not syndicating output from Yahoo pipe

I am trying to syndicate the output of a Yahoo Pipe using FeedWordPress. I am using FeedWordPress version 0.99.

The RSS feed for the pipe is at:

http://pipes.yahoo.com/pipes/pipe.run?_id=Lr7PfZh33BGHQ2FkqGIyXQ&_render=rss

I know the feed is working because I am able to subscribe to it in Bloglines.

I know the plugin is working in general because I didn’t have a problem syndicating another feed.

I have entered the feed address referenced above under the syndication subtab of the syndication tab, and the site appears under the syndicated sites list. However, none of the posts in the feed are showing up in my list of posts or on my site. When I click on “update feeds now” under the syndication tab, it says “Update complete. 0 new posts were syndicated and 0 existing posts were updated.”

I have the FeedWordPress Options set to publish syndicated posts immediately.

My site is at http://www.PoliticalPartyPets.com.

How can I fix this?