Fix urlManager

My config:
```php
'defaultRoute' => 'index',
'components' => array(
    'urlManager' => array(
        'enablePrettyUrl' => true,
        'rules' => array(
            array(
                'pattern' => '<controller:\w+>/<action:\w+>/<param:[\d\w]+>',
                'route' => 'index',
                'defaults' => array(
                    'controller' => 'index',
                    'action' => 'index',
                    'param' => false,
```
My IndexController:
```php
class IndexController extends Controller
{
    public function actionIndex($controller, $action, $param)
    {
        echo $this->render($action);
    }
```

http://yii2.my/index/about
is response message "Invalid Route"