Cannot Send Session Cache Limiter

[irfanmodan]

when i run client side login page...

in login page i include menutop.php,then in menutop me call commonfile.php,code of commonfile.php as below.....

<? session_start(); ?>
<?
require_once("include/function.php");
ob_start();
if (!session_is_registered("user_error"))
{
    session_register("user_error");
    $_SESSION["user_error"]="";
}
visitor_record();
if (get_session("sitelanguageid") == "")
set_session("sitelanguageid" ,findsettingvalue("website_default_language_id"));
 
$sitelanguageid=get_session("sitelanguageid");
?>

when i enter wrong username and password the below eror will generate.....
"Cannot Send Session Cache Limiter - Headers Already Sent(output started at C:\xampp\htdocs\xampp\site\login.php:16) in C:\xampp\htdocs\xampp\site\commonfile.php on line 1)"

please please help me to solve this error this error asap.....

[Antonio Marcos]

Find the file php.ini, open it and edit the line

session.cache_limiter = nocache

If the value was 'nocache', than change for 'public'.

session.cache_limiter = public

[irfanmodan]

Thank u very much....its work......thaks a lot.....