Trouble building login system

Perhaps this questions is best posed to David Powers, but I'm having some problems with my login system for a site that I'm building with the assistance of "The Essential Guide To Dreamweaver CS4".
I believe that I have followed his instructions, but when I login using a valid username and password entered into my "users" table in my database, I get redirected to the failed login page.
I'm using encrypted passwords, and I believe that I have encrypted the password for the login attempt so that it should match the encrypted password in my table.
Below is the code for my login page:
<?php require_once('../Connections/aibAdmin.php'); ?>
<?php
if (isset($_POST['password'])) {
    $_POST['password'] = sha1($_POST['password']);
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
$theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
return $theValue;
?>
<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
session_start();
$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
$_SESSION['PrevUrl'] = $_GET['accesscheck'];
if (isset($_POST['username'])) {
$loginUsername=$_POST['username'];
$password=$_POST['password'];
$MM_fldUserAuthorization = "content_priv";
$MM_redirectLoginSuccess = "/admin/users/register.php";
$MM_redirectLoginFailed = "/admin/login.php";
$MM_redirecttoReferrer = true;
mysql_select_db($database_aibAdmin, $aibAdmin);
$LoginRS__query=sprintf("SELECT username, password, content_priv FROM users WHERE username=%s AND password=%s",
GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));
$LoginRS = mysql_query($LoginRS__query, $aibAdmin) or die(mysql_error());
$loginFoundUser = mysql_num_rows($LoginRS);
if ($loginFoundUser) {
    $loginStrGroup = mysql_result($LoginRS,0,'content_priv');
    //declare two session variables and assign them
    $_SESSION['MM_Username'] = $loginUsername;
    $_SESSION['MM_UserGroup'] = $loginStrGroup;
    if (isset($_SESSION['PrevUrl']) && true) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];
    header("Location: " . $MM_redirectLoginSuccess );
else {
    header("Location: ". $MM_redirectLoginFailed );
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Administrator Login</title>
</head>
<body>
<h1>Administrator Login</h1>
<form action="<?php echo $loginFormAction; ?>" method="POST" name="admin_login" id="adminLogin">
<p><label for="username">Username:</label>
<input type="text" name="username" id="username" /></p>
<p><label for="password">Password:</label>
<input type="password" name="password" id="password" /></p>
<input name="submit_button" type="submit" id="submitButton" value="Log In" />
</form>
</body>
</html>
Any assistance would be greatly appreciated. I'm also eager to learn more, so if there is literature that someone might be willing to suggest, that would be most appreciated as well.
Thanks!

Proper Prior Planning Prevents Poor Performance.
Building a (close to) state of the art machine takes information and patience.
Components that worked on your previous system will not work on your new one.
The power supply must have 2 mother board connectors.
BEFORE YOU RUSH OUT TO BUY A NEW ONE ----
Make a list of what you plan on having in your new system now and 12 months from now.
Ok, got the list?
Find a post from "DANNY"
Go to the power supply capacity link
Fill it in
Buy a power supply that matches your current and future requirements.
Best of luck

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ewaller$@$odin ~ 1002 %
Last edited by ewaller (2014-08-23 23:33:53)

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