Here's a sample entry from our current podcast feed:
<item>
<guid isPermaLink="false">tag:soundcloud,2010:tracks/47899683</guid>
<title>FTL2012-05-28</title>
<pubDate>Tue, 29 May 2012 02:39:55 +0000</pubDate>
<link>
http://soundcloud.com/freetalklive/ftl2012-05-28</link>
<itunes:image href="
http://i1.sndcdn.com/artworks-000024122160-orps3s-original.jpg?6b62d62" />
<itunes:duration>2:04:22</itunes:duration>
<itunes:author>Free Talk Live</itunes:author>
<itunes:subtitle>FTL2012-05-28</itunes:subtitle>
<itunes:summary>Peace Activists Enter Memorial Day Parade :: Platitudes :: Porcfest and Alcohol Sales :: Supporting the Troops :: Depleted Uranium :: Honor :: Ending Struggle Over Resources :: Type Zero Culture :: Finding Peace :: 3D Printing :: Fear :: Terrorists :: Chicken! :: So-Called Libertarian Veteran :: Protecting Minorities</itunes:summary>
<description>Peace Activists Enter Memorial Day Parade :: Platitudes :: Porcfest and Alcohol Sales :: Supporting the Troops :: Depleted Uranium :: Honor :: Ending Struggle Over Resources :: Type Zero Culture :: Finding Peace :: 3D Printing :: Fear :: Terrorists :: Chicken! :: So-Called Libertarian Veteran :: Protecting Minorities</description>
<author>
ian@freetalklive.com (The FTL Crew)</author><media:content url="
http://feedproxy.google.com/~r/ftlradio/~5/VF3QtCUI1jI/47899683-freetalklive-ftl2012-05-28.mp3" fileSize="59771185" type="audio/mpeg" /><itunes:explicit>no</itunes:explicit><itunes:keywords>talk,radio,fm,am,xm,hot,free,keene,liberty,freedom,voluntaryist,voluntarism,voluntarist,anarchist,anarchism,anarchy,libertarian,free,state,project,new,hampshire,activism,shire</itunes:keywords><enclosure url="
http://feedproxy.google.com/~r/ftlradio/~5/VF3QtCUI1jI/47899683-freetalklive-ftl2012-05-28.mp3" length="59771185" type="audio/mpeg" /><feedburner:origEnclosureLink>
http://feeds.soundcloud.com/stream/47899683-freetalklive-ftl2012-05-28.mp3</feedburner:origEnclosureLink></item>
As you can see the enclosure tags properly link to an MP3. I am not sure why that your program is incompatible with this. Again, it tests good with Feed Validator, so I'm not sure what to do.
