The feed url needs query string parameters, you should right click the feed icons in the forums and copy the url from there to enter as the feed url in Feed Manager. The forums must be on a publicly accessible page.

Hope it helps,

Joe

yes it is possible, just copy the url for one of the forum feeds and back out the ItemID parameter leaving the pageid and mid params

like if the url is "http://localhost/Forums/RSS.aspx?ItemID=1&mid=13&pageid=11"

change it like

"http://localhost/Forums/RSS.aspx?mid=13&pageid=11"

the ItemID represents the individual forums

Hope it helps,

Joe