I tried entering the location of the feeds into my reader and it returns a message saying that it found the server, but not the feed. Both URLs return the same message
http://www.picaxeforum.co.uk/external.php?type=rss2
http://www.picaxeforum.co.uk/external.php?type=rss
http://www.picaxeforum.co.uk/external.php?type=rss2
http://www.picaxeforum.co.uk/external.php?type=rss