iTunes giving error Can’t download episodes from your feed.

You have introduced a fatal error into your feed which renders it unreadable. The first 'description' tag in line 13 reads:

<description>The Hub for Midsize Companies, Vendors, Capital Providers & Influencers Worldwide</description>

You cannot have an ampersand ('&') by itself in a feed because in XML it signifies the beginning of a code sequence. Since this is never completed it looks to RSS readers as if the rest of the feed is the code. You need to replace it with either the word 'and' or the code

&amp;

as you have done in a number of other instances. I haven't checked to see whether there are any other loose ampersands in the feed.

There is an additional point which might well cause problems. Your enclosure tags contain only the URL of the media file. The need also to contain 'length' and 'type' attributes, like this:

<enclosure url="THE FULL URL OF THE MEDIA FILE FOR THE EPISODE" length="FILE SIZE IN BYTES" type="FOR AN MP3 FILE - audio/mpeg" />

The 'length' attribute may not matter so much with the Store, but it needs the 'type' to recognize the file.

Also, your media files are hosted on Amazon and use https (secure connection). This is inadvisable; if in each case you change the https to http it should still work. There have been problems with the use of Amazon, so if you still get problems after correcting the two points above that would be the next place to look.

Most validators only check that the actual XML is valid. It's worth using http://castfeedvalidator.com/ which checks the media files as well.

Your problem is that you now have no 'enclosure' tags, so no media files accessible to iTunes. You had these tags before, so you've done something to get them removed.

That's not the result I get with CastFeedValidator, indeed it complains it can't parse the feed because of invalid XML in line 1, though two other validators do not confirm this, and I can't see anything wrong. However you definitely do not have any enclosure tags in your feed. Please look at the actual coding - the easiest way to do this is to look at this FeedValidator report.