Renaming The Protected Folder

Hi Everyone

I want to rename the protected folder, so

I set the $config in index.php to

$config = dirname(__FILE__) . '/myprotected/config/main.php';

Everything works ok except an issue
Trying to include a file like this

Yii::import('application.vendors.myvendor.*');
require_once('myExt.php');

An error occurs

include_once(C:\wamp\www\myproject\protected\vendors\myvendor\myExt.php)

Although the 'basePath' => dirname(__FILE__) . DIRECTORY_SEPARATOR . '..' in config file is correct, the above message indicates that the folder continues to be the "protected" folder.

what I missed ?

Thanks