Well that really doesn't explain a whole heap of a lot. What exactly is going on? Have you tried to "Run the Scheduled Task Now" option? Have you made sure the "Feed is Enabled"? Is the RSS Feed link correct?
I have no idea which feeds you are talking about. Are you using a feed to add content to your site? If so, please provide a link and tell us the exact settings you have applied on the RSS Feed Setting page. If you are talking about the feed for your site, then please provide a link.
And do you have a busy enough forum that the job is actually running every 10 minutes? And is there enough in the feed that it would actually provide anything every 10 minutes?