But you've already migrated the feed to feedburner:
http://feeds.feedburner.com/choicetravelspots/uztR
You're using some kind of plugin that redirect WP default feed to Feedburner, check that, it seems to have an unecessay space somewhere. It shows up in the browser like this:
http://feeds.feedburner.com/%20choicetravelspots/uztR
The "%20" represents a space (when you press spacebar) and thats why it's not redirecting correctly