but you have to log in... I will take out my other feeds before I hand over the username/password to you.

Now you can see

btw: I can see you modified the link, but the header is not modified:
<link title="RSS" type="application/rss+xml" rel="alternate" href="http://feeds.feedburner.com/xys" charset="utf-8" />

you can add the new one:
<link title="RSS" type="application/rss+xml" rel="alternate" href="http://feed.feedsky.com/xys" charset="utf-8" />

This is for Feed Autodiscovery :)