Virtual Attributes In Model Won't Bind

Hi guys,

Whenever I add a virtual attribute field to my model like so:

class User extends CActiveRecord
{
	public $title;

I can't seem to bind the data in my update action in the controller:

public function actionUpdate($id)
	{
		$model = $this->loadModel($id);
		if(isset($_POST['User']))
		{
			$model->attributes = $_POST['User'];

 			if($model->save())
 				$this->redirect(array('view','id' => $model->userId));
		}

		$this->render('update',array(
			'model'=>$model,
		));
	}

Then when I go look at what's in $model->attributes i can't find my $model->title anywhere.
It's in the $_POST['User'], but for some reason it won't bind to my model.
Anyone got any thoughts on how to troubleshoot this?

Thx in advance!