Author RSS Feed

Hi,

I’m having really hard time with the rss feed to each of the blogs author. Each one has mini-blog inside the blog, and each one want an icon with rss feed to his posts.
I have tried it in many ways but still all I get is a feed to all posts from the blog.
I think it is connected the feedburner integration.
Right now the rss url I am using (for example) looks like that:
http://www.madeira.co.il/?feed=rss2&author=1
and I have also tried /feed/[author_nice_name]/
and also tried /feed/[author_id]/

any help will be much appreciated!
Thank you.