File protected/controllers/user/Foo.php not loading why..?

Foo.php

<?php

class ChangePassword extends CAction {

 ... action code here


}

UserController.php

<?php 
class UserController extends Controller
{
	public function actions()
	{
	   return array(
		'changePassword'=> 'application.controllers.user.ChangePassword',
	   );
	}

 ....

}