Nest question is that I noticed on your example the url is flv. and the url I have for my live feed is smil... does that matter.
for example:
Code:
<rssversion="2.0"
xmlns:media="http://search.yahoo.com/mrss/"
xmlns:jwplayer="http://developer.longtailvideo.com/trac/wiki/FlashFormats">
<channel>
<title>ExamplemediaRSSplaylist</title>
<item>
<title>HighwindsVideo</title>
<media:contenturl="http://hwcdn.net/a5d3k3d1/fls/24845-Cog-Event.smil"/>
<jwplayer:provider>highwinds</jwplayer:provider>
<jwplayer:rtmp.loadbalance>true</jwplayer:rtmp.loadbalance>
</item>
<item>
<title>VDOXVideo</title>
<media:contenturl="http://myserver.com/video.flv"/>
<jwplayer:provider>rtmp</jwplayer:provider>
<jwplayer:rtmp.loadbalance>true</jwplayer:rtmp.loadbalance>
</item>
</channel>
</rss>