RSS dosent work!!

When I go to the feed page all that comes up is:

Warning: Cannot modify header information – headers already sent by (output started at /home/quill/public_html/cron/wordpress/wp-blog-header.php:516) in /home/quill/public_html/cron/wordpress/wp-rss2.php on line 19

and then links to articles and coments but not formated. Example:

http://cron.quill.statichost.co.uk/2005/05/01/ballet-preformance/ http://cron.quill.statichost.co.uk/2005/05/01/ballet-preformance/feed/ http://cron.quill.statichost.co.uk/2005/04/27/statistic-freekyness/ http://cron.quill.statichost.co.uk/2005/04/27/statistic-freekyness/#comments Wed, 27 Apr 2005 20:58:36 +0000 Cron Internet My Site http://cron.quill.statichost.co.uk/2005/04/27/statistic-freekyness/ http://cron.quill.statichost.co.uk/2005/04/27/statistic-freekyness/feed/ http://cron.quill.statichost.co.uk/2005/04/25/hakama-shiba-ken/ http://cron.quill.statichost.co.uk/2005/04/25/hakama-shiba-ken/#comments Mon, 25 Apr 2005 21:27:02 +0000 Cron Blog Pi-Chan Graduation http://cron.quill.statichost.co.uk/2005/04/25/hakama-shiba-ken/ http://cron.quill.statichost.co.uk/2005/04/25/hakama-shiba-ken/feed/

Any sugestions? Please help!!