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Error: Feed failed! Causes may be (1) No data found for RSS feed http://rss.groups.yahoo.com/group/ChallengerNX04/rss; (2) There are no items are available for this feed; (3) The RSS feed does not validate.

Please verify that the URL http://rss.groups.yahoo.com/group/ChallengerNX04/rss works first in your browser and that the feed passes a validator test.