还是大小写不敏感的问题，求教

各位大侠：
还是密码大小写的问题，一下是dreamweaver自动生成的用户登陆代码，问题是，用户登陆的时候，密码不关是大小写都可以登陆，问题出在哪里？应该怎么该代码，验证密码的时候是大小写敏感。
谢谢

// *** 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['name'])) {
  $loginUsername=$_POST['name'];
  $password=$_POST['password'];
  $MM_fldUserAuthorization = "";
  $MM_redirectLoginSuccess = "jian1.php";
  $MM_redirectLoginFailed = "../../no-name.html";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_green, $green);
  
  $LoginRS__query=sprintf("SELECT name, password FROM `user` WHERE name=%s AND password=%s",
    GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));
   
  $LoginRS = mysql_query($LoginRS__query, $green) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
     $loginStrGroup = "";
   
    //declare two session variables and assign them
    $_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 );die;
  }
}