note 29371 added to function.session-start

iam using apache with php4 windows installer. i get this error when i try to use session_start() Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\Program\Apache Group\Apache2\htdocs\start.php:18) in C:\Program\Apache Group\Apache2\htdocs\inc\login_info.php on line 13 on linux i never get this problem with the same page :/ -- http://www.php.net/manual/en/function.session-start.php http://master.php.net/manage/user-notes.php?action=edit+29371 http://master.php.net/manage/user-notes.php?action=delete+29371 http://master.php.net/manage/user-notes.php?action=reject+29371