Podcast won't read in iTunes

I uploaded the podcast and it plays in RSS feed. I tested it with putting my RSS feed in iTunes with "Subscribe to podcast." It shows the art and decription and title of episode, but whenever I click play, it will quickly run a load bar saying "Reading item..." and then nothing happens. Any idea what I'm doing wrong?

I figured it out. I used Logic Pro to record and it exported as an .m4a file rather than an .mp3. I converted it to .mp3 and it wouldn't play. I reverted to .m4a, it uploaded fine and is now streaming fine.