Feed error in IE

I use Internet Explorer at work (I’m on Safari right now) and whenever I try to get an update on my RSS feed at work, it displays the message “Internet explorer is unable to update password-protected feeds”. It works perfectly in Safari and Firefox though. I use feedburner and my RSS link is http://feeds.feedburner.com/beechin. I’ve never had password protect on my blog and its not password protected through feedburner either. Does anyone know why this error is showing up and how I can fix it? (here is my link: http://www.beechin.com)

thanks