Comment Form in RSS feeds

Hi,
i’m trying to alter the standard rss feed to include a simple comment form, everything is working ok, except that when someone actually comment they’re take to wp-comment-post.php, but the comment doesn’t get posted, any ideias on what I might be forgeting?

I just reproduced the form code I have on a standard post page, and included it on the bottom of every rss entry. It seems to me that I might have to include some more hidden state information on the form but I’m not sure if that’s the problem… since I don’t actually know the flow of the comment engine I would love some help here.