http://itunes.apple.com/pk/podcast/mike-litman-mike-litman-show/id524139180
is looking for a feed at
http://www.mikelitman.com/?feed=podcast
However it is complaining that there is no file at this address. There does appear to be a feed there but the server is returning the 404 (file not found) error.
http://itunes.apple.com/pk/podcast/get-it-going-nation-podcast/id213033512
is using the feed at
http://www.mikelitman.com/podcast/uyg.xml
When iTunes cannot find the feed the episodes which it saw when it last found the feed will remain on the Store, though it's not possible to subscribe.
To get a podcast removed, follow Apple's instructions:
'If you are no longer creating a podcast and you want it removed from iTS, you should:
Log into iTS.
Find and select your podcast.
Click on Report a Concern under the Links heading on the far left.
Select "Remove a Podcast" from the Choose a Reason menu.
Explain why you want the podcast removed.
In most cases, we will remove the podcast from iTS, especially if we find that the podcast is no longer available at the feed URL.'
Or you could add this tag:
<itunes:block>yes</itunes:block>
somewhere between the 'channel' tag and the first 'item' tag. You will need to leave the feed in place for a time (and of course it has to be readable).
