Connect to the Internet, open your web browser and navigate to Feedburner. Log in to your Feedburner account.
Click on your iTunes podcast feed.
Click on "Edit Feed Details."
Copy and Paste the following tag in your feed: "<itunes:new-feed-url>your new feed URL</itunes:new-feed-url>," replacing "your new feed URL" with the URL for your new iTunes podcast feed.
Click on "Save Feed Details." Log out of Feedburner. ITunes will be informed of the change of feed and update its directories.
Log back into Feedburner after 48 hours.
Click on your iTunes podcast feed.
Click on "Edit feed details."
Copy and paste your new iTunes podcast feed URL next to "Feed address."
Click on "Save feed details." Your new feed address has now been updated on both the iTunes store and Feedburner.