GridView Pagination & Search not working properly

Yii 1.1 General Discussion
1

Actually in my grid view all works good! but when i go to another page then the search field not work & i have the reload the page again for search! here is my code:
https://stackoverflow.com/q/61699362/5672730
Controller:

public function actionAdmin()
    {
        $model = new Territory('search');
        $model->unsetAttributes();  // clear any default values
        if (isset($_GET['Territory']))
            $model->attributes = $_GET['Territory'];
        $this->pageTitle = 'TERRITORY SETUP';
        $this->render('admin', array(
            'model' => $model,
        ));
    }

Model:
public function search()
{

    $criteria = new CDbCriteria;
    $criteria->compare('id', $this->id);
    $criteria->compare('territory_name', trim($this->territory_name), true);
    $criteria->compare('tso_code', trim($this->tso_code), true);
    $criteria->compare('status', $this->status);

    return new CActiveDataProvider($this, array(
        'criteria' => $criteria,
        'pagination' => array(
            'pageSize' => 100,
        ),
        'sort' => array(
            'defaultOrder' => 'area_id, territory_name, tso_code ASC',
        ),
    ));
}

View:
$this->widget(‘ext.groupgridview.GroupGridView’, array(
‘id’ => ‘territory-grid’,
‘dataProvider’ => $model->search(),
‘filter’ => $model,
‘mergeColumns’ => array(‘area_id’),
‘cssFile’ => Yii::app()->theme->baseUrl . ‘/css/gridview/styles.css’,
‘template’ => “Click on titles to re-arrange order (Ascending/Descending){pager}{summary}{items}{pager}”,
‘columns’ => array(
‘territory_name’,
‘tso_code’,
)
));