When i try to submit my first podcast episode, i get an error message "we had difficulty downloading episodes from your feed

Hello! i am trying to submit my podcast feed into itunes but get "we had difficulty downloading episodes from your feed". I'm using the soundcloud podcasting beta, and i've tried almost every thing. Also when i try to test my feed by subscribing to it first, everything works except the episode wont play. any help?

RSS Feed:http://feeds.soundcloud.com/users/soundcloud:users:141115987/sounds.rss