Q: Cant Download episodes from your feed

Your feed has three episodes, but only the second one has a playable media file. Only episodes with playable media appear in iTunes, and on submission the Store checks only the top episode: hence they don't see anything to download. you need to reorder the episodes so that 'Episode zero' appears at the top, or remove the top episode (which contains several images, but won't appear in iTunes anyway).

Yes. You've made the feed in Site-Server and I can't advise on how to use that: possibly it can generate a purely podcast feed.