Feed and Comments/feed Not Found error

Hi to everybody.

I’m new to wordpress and there’s something which I can’t solve on my own. I have: ” Entries (RSS) – Comments (RSS) “
in my footer page (www.scrical.it) but both links have the same error: “The requested URL /feed/ was not found on this server.” In fact these two directories don’t exist. I’ve upgraded from 2.1 WordPress version but I don’t remember if I created them manually. In the old version the two links had the same behaviour as the RSS link in this forum. And this is as I’d like them to work also on my site.

Has anybody an idea about what I have to do?

Thanks
gabi