double login problem

[webhead]

I have a from page which requires login with a username and password. It appears to work but when you go to the form page and submit the form, it takes you back to login again. The second time you supply the correct username and password it works fine.

 

Here's code from the form page:

<?php
//check for authorization
session_start();
if ($_SESSION['logged'] != 1)
{
$redirect = $_SERVER['PHP_SELF'];
header ("Location: filemaint_login.php");
die();
}

 

And this is the code from the login page:

session_start();
define ('SQL_HOST','blah');
define ('SQL_USER','blah');
define ('SQL_PASS','blah');
define ('SQL_DATB','blah');
define ('SQL_LUSR','blah');
define ('SQL_LPAS','blah');
$_SESSION['logged'] = 0;

if(isset($_POST['submit']))
{
if ($_POST['username'] == SQL_LUSR && $_POST['password'] == SQL_LPAS)
{
 $_SESSION['logged'] = 1;
 header ("Location: file_maint.php");
}
else

[webhead]

Sorry, I posted this in two spots, and I don't see how to delete this one.