[WP Greet Box] links to old rss url

I have a weird situation

I’ve installed WP Greet Box plugin and I configured it by adding the URL for my rss feed. This URL is http://feeds.feedburner.com/destination-world/feed
For some reason however, the URL that WP Greet Box uses is the old RSS URL I changed weeks ago (http://feeds.feedburner.com/destination-world/AylK)

To see what I mean go to this link http://www.stumbleupon.com/su/1T1BqH/www.destination-world.net/my-2011-resolutions/ and click on “subscribe to the RSS feed”

Why is this happenign? Where does WP Greet Box take this old RSS URl from?

Thanks for your help
M