note 35707 added to ref.session

hi all, i have some probleme with my session. I explain : i use session_start(); to open a session just after the tag <BODY> and after in my php file I chek if $PHPSESSID ( var apache of php session) is valid bt if ($PHPSESSID) { My script to identifiy the guys } but i have a error : Warning: Cannot send session cache limiter - headers already sent (output started at /var/www/test.php.php:7) in /var/www/test.php on line 86 and on my line 86 i have only HTML tad so i dont undestand where this error comes ? Can u help me please !! :) Thx all. ---- Manual Page -- http://www.php.net/manual/en/ref.session.php Edit Note -- http://master.php.net/manage/user-notes.php?action=edit+35707 Delete Note -- http://master.php.net/manage/user-notes.php?action=delete+35707&report=yes Reject Note -- http://master.php.net/manage/user-notes.php?action=reject+35707&report=yes