The program can be logged in the original, why I added the automatic login section (the front 1-15 lines), the system does not detect the user profile after the login interface out, please help to see, thank you

The program can be logged in the original, why I added the automatic login section (the front 1-15 lines), the system does not detect the user profile after the login interface out, please help to see, thank you
Include (' connect.php ');
Include (' loginchg.php ');
Before you log in, determine if you have selected automatic login
$query = "SELECT * from Netoa.users where urname= ' {$_session[' Username ']} ' and urpassword= ' {$_session[' Password ']} '";
Oci_free_statement ($stmt);
$stmt =oci_parse ($conn, $query);
$result = Oci_execute ($stmt);
if ($ruselt)
{
Automatically login if session variable name matches password
Header (' location:http://localhost/index.php ');
Exit
}
?>




<title>User Login</title>

br> system Department copyright©2012

