cookie problem

[bjb]

$name=$_POST['user'];
    $password=$_POST['password'];
    $logged_in=FAlSE;
if (!empty($name)&&!empty($password)){
  echo $name;
  if ($name=="testuser" &&$password=="testpw"){
          $cookie=Array('USER'=>$name,'PASSWORD'=>md5($password));
          setcookie('login',serialize($cookie));
          echo '<h1>Hallo '.$name.'</h1>';
  }
  else{
      die('<div class="err"> Passwort und/oder Username falsch</div>');
  }
}
der teil hier drüber geht

else{
  if (isset($_COOKIE['login'])){
        $cookie=unserialize($_COOKIE['login']);
        $name=($cookie['USER']);
        $logged_in=((md5('testpw')==$cookie['PASSWORD'])&&($name=='testuser'));

echo(var_dump($logged_in))         ====>false sollte aber true sein

if ($logged_in==true){
          echo '<h1>Hallo '.$name.'</h1>';}
        else login();
  }
  else login();
}