hi all,
i have a problem of session in php5

in my first page i have this code

Code:
<?php
session_start();
//Some code here

$_session['User_Logged']="Yes";

?>
and in my other page i want to read the session variable to know if the user is logged in or not
Code:
<?php
session_start();

if($_session['User_Logged']!="Yes") 
{
	echo "You are not logged in."
	exit();
}

//Some Actual Working HERE
?>
but i get an error in the red line above

Undefine Index User_Logged

this code has worked fine for me in php4 before
pls help