Podcast validation: Server returned HTTP Error 404: Not Found

Could the problem be with the URLs in the top xml section? The bold ones return 404

<?xml version=”1.0″ encoding=”UTF-8″?><rss version=”2.0″
xmlns:content=”http://purl.org/rss/1.0/modules/content/&#8221;
xmlns:wfw=”http://wellformedweb.org/CommentAPI/&#8221;
xmlns:dc=”http://purl.org/dc/elements/1.1/&#8221;
xmlns:atom=”http://www.w3.org/2005/Atom&#8221;
xmlns:sy=”http://purl.org/rss/1.0/modules/syndication/&#8221;
xmlns:slash=”http://purl.org/rss/1.0/modules/slash/&#8221;
>

Thanks. Looks like the actual podcast feed to use is: https://888.352.godaddywp.com/?feed=rss2&post_type=wpfc_sermon

The podbase validator is saying there is an issue with “Support for HTTP HEAD requests” that I’m not sure how to control.