My podPress iTunes' feed was working and running until I changed my template. But I don't think that was the reason it stopped working. I found this issue that iTunes would not old feeds in their place and would replace them with new episodes. To fix this issue I changed "Syndication feeds show the most recent" via podPress and WP from 10 post to 100. Since then I get these error messages when I try to validate my feed.
here is my feed address http://feeds.feedburner.com/JazzNightsOfTehran
Any idea how can I fix it?