Yii Framework ขึ้น Error แบบนี้แก้ไงครับ?????????????????????

<?php
class Chapter5Controller extends Controller{
    function actionCGridView(){
        $model = new Book();
        $books = new CActiveDataProvider($model);
        
        $this->render("CGridView" , array(
            "books" => $books
        ));
    }
    function actionCListView(){
        $model = new Book();
        $books = new CActiveDataProvider($model);
        
        $this->render("CListView" , array(
            "books" => $books
        ));
    }
}
?>

<?php
class Book extends CActiveRecord{
    public static function model($className = __CLASS__) {
        return parent::model($className);
    }
    public function tableName() {
        return "books";
    }
    public function attributeLabels() {
        return array(
            "id" => "รหัส" ,
            "name" => "ชื่อหนังสือ" ,
            "price" => "ราคา"
        );
    }
}
?>

<?php
$this->widget('zii.widgets.CListView' , array(
    'dataProvider' => $books ,
    'itemview' => '_CListView'
));
?>

<div>
    <div>
        <span><?php echo $data->id; ?></span>
        <span>หนังสือ = <?php echo $data->name; ?></span>
    </div>
    <div>
        <span>ราคา = <?php echo $data->price; ?></span>
    </div>
</div>
<hr>

<?php
class Chapter5Controller extends Controller{
    function actionCGridView(){
        $model = new Book();
        $books = new CActiveDataProvider($model);
        
        $this->render("CGridView" , array(
            "books" => $books
        ));
    }
    function actionCListView(){
        $model = new Book();
        $books = new CActiveDataProvider($model);
        
        $this->render("CListView" , array(
            "books" => $books
        ));
    }
}
?>

<?php
class Book extends CActiveRecord{
    public static function model($className = __CLASS__) {
        return parent::model($className);
    }
    public function tableName() {
        return "books";
    }
    public function attributeLabels() {
        return array(
            "id" => "รหัส" ,
            "name" => "ชื่อหนังสือ" ,
            "price" => "ราคา"
        );
    }
}
?>

<?php
$this->widget('zii.widgets.grid.CGridView' , array(
    'dataProvider' => $books ,
    'columns' => array(
        'id' ,
        'name' ,
        'price'
    )
));
?>