setting up rss feed within wpmu for specific category of posts

I’m setting up a blog for general viewing along with a blog for use behind the membership paywall. I’m using categories to separate the two topics.

I would like musings to be open and to have an RSS feed associated with it.

When I try to setup a feed, first feed burner doesn’t find or recognize a feed for that category.

http://fmsreliability.com/education/?cat=10&feed=rss2

or

http://fmsreliability.com/education/category/musings/feed/

Feedburner and Socialite seem to only find hte feed for the entire site fmsreliability.com and not the site ~/education much less the specific category

Is it possible to set up a feed for specific category that permits others to subscribe to just that category of posts? If so, how?

cheers,

Fred