note 38104 added to function.session-start

I am getting this: Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at c:\program files\apache group\apache\htdocs\horses_fns.php:2) in c:\program files\apache group\apache\htdocs\register_new.php on line 17 Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at c:\program files\apache group\apache\htdocs\horses_fns.php:2) in c:\program files\apache group\apache\htdocs\register_new.php on line 17 Please advise, Thanks. ---- Manual Page -- http://www.php.net/manual/en/function.session-start.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+38104 Delete -- http://master.php.net/manage/user-notes.php?action=delete+38104&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+38104&report=yes Search -- http://master.php.net/manage/user-notes.php