Problem With Cascadedropdown

i am following this tutorial to create 2 dropdownlist depended on a master dropdownlist selected value

first, i want to select the cycle from the cycle list, and based on this value, the list of classes and subjects/periods must appear

this is my code:

in _form.php:




<?php

	echo CHtml::dropDownList('CycleID','', CHtml::listData(Usersectionsecurity::model()->findAll(), 'Group_Code', 'E_Group_Desc'),

		array(

			'prompt'=>'Select Cycle',

			));		

	echo CHtml::dropDownList('stclass', '', array());

	echo $form->dropDownList($model,'periodID', array());

	

	ECascadeDropDown::master('CycleID','Usersectionsecurity/getClassByCycle') //'controllerId/actionId'

			  ->setDependent('stclass') //master for id_article with default options

			  ->setDependent('periodID', //with custom labels

							  array('dependentStartingLabel'=>'Select Classes','dependentLoadingLabel'=>'Loading articles...'));

							  

?>



in my controller:




	public function actionGetClassByCycle()

	{

		ECascadeDropDown::checkValidRequest(); 

		

		$type = Yii::app()->user->getType();

		$userID = Yii::app()->user->getID();

		

		if($type == 'Teacher'){

			$model = Stclass::model()->GetClassOfUser($userID, ECascadeDropDown::submittedKeyValue());

		}else{

			$model=Usersectionsecurity::model()->findAll('Group_Code=\'' . ECascadeDropDown::submittedKeyValue() . '\''); 

		}

		

		$models=Matiere::model()->GetMainSubjectByCycle(ECascadeDropDown::submittedKeyValue());

		

		$data = array(

			'CycleID' => CHtml::listData($model,'Class_Code', 'E_Class_Desc')

			

			,

		 

			'stclass' => CHtml::listData($models,'Subject_Code', 'E_Subject_Name')

			

		);

		

		$masterId = ECascadeDropDown::submittedMasterId();  //master dropdownlist id_type or id_company

		$masterKey = ECascadeDropDown::submittedKeyValue(); //the current key of the master

		//$dependentId = ECascadeDropDown::submittedDependentId(); //if you need the dependent id




		if(isset($data[$masterId][$masterKey]))

			ECascadeDropDown::renderArrayData($data[$masterId][$masterKey]); //with Yii::app()->end()


 

		ECascadeDropDown::renderEmptyData('-');

	}




i made a var_dump($data), i get values but they not appears in the appropriate dr




array(2) {

  ["CycleID"]=>

  array(3) {

    [24]=>

    string(7) "Grade 4"

    [25]=>

    string(7) "Grade 5"

    [26]=>

    string(7) "Grade 6"

  }

  ["stclass"]=>

  array(10) {

    ["020"]=>

    string(28) "French as a Foreign Language"

    ["040"]=>

    string(4) "Math"

    ["061"]=>

    string(9) "Geography"

    ["062"]=>

    string(7) "History"

    ["070"]=>

    string(16) "Cultural Studies"

    ["080"]=>

    string(6) "Civics"

    ["090"]=>

    string(18) "Physical Education"

    [110]=>

    string(3) "Art"

    [120]=>

    string(5) "Drama"

    [130]=>

    string(5) "Music"

  }

}

[{"value":"","label":"-"}]



where is my error. please help me

is there any help in this extension