simpletree extension

i put this code into the view of my module(admin) but js and css dont appear

if i put the same code in my application it works, insidethe module doesnot


$this->widget('application.extensions.SimpleTreeWidget',array(

    'model'=>'Amodules',

    'ajaxUrl' => $this->createAbsoluteUrl('admin/ajax/simpletree'),

));

this is my ajax controller in admin module


class AjaxsimpletreeController extends Controller

{

	public function actionsimpletree()

        {  

            Yii::import('application.extensions.SimpleTreeWidget');    

            SimpleTreeWidget::performAjax();

        }

}

how can i fix that…?

thanx beforehand

any ideas?

I don’t know that extension …

did you get 404 error (not found) for your css and js ?

More informations would be helpfull …