Page redirect help

[fife]

Hi.  I am trying to make a signing in script send users with access level 1 to one members area, level 2 to another and level 3 to another!  Now i have made the script so it checks their access level but i dont understand how to make it send the users to different areas!  Level onces can sign in fine.  Can someone please show me the error of my ways in my code and how to fix it?

 

<?
if (!isset($_SESSION)) {
  session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['Username1'])) {
  $loginUsername=$_POST['Username'];
  $password=$_POST['Password'];
  $MM_fldUserAuthorization = "Accesslevel";
  $MM_redirectLoginSuccess = "level1.php";
  $MM_redirectLoginFailed = "Signinfail.php";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_con1, $con1);
  	
  $LoginRS__query=sprintf("SELECT Username, Password, Accesslevel FROM Members WHERE Username=%s AND Password=%s",
  GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text")); 
   
  $LoginRS = mysql_query($LoginRS__query, $connection1) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
    
    $loginStrGroup  = mysql_result($LoginRS,0,'Accesslevel');
    
   
    $_SESSION['MM_Username'] = $loginUsername;
    $_SESSION['MM_UserGroup'] = $loginStrGroup;	      

    if (isset($_SESSION['PrevUrl']) && false) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];	
    }
    header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    header("Location: ". $MM_redirectLoginFailed );
  }
}
?>