验证码刷新出问题，求解惑 [ 新手入门 ]

{"hash1":657,"hash2":657,"url":"\/jingdian2.0\/site\/captcha\/v\/50a9f3cb2a5f8\/"} 点击刷新出现这样的页面，不知道改了哪里出问题了 附上view代码

<?php $form=$this->beginWidget('CActiveForm'); ?>

    <p class="note">Fields with <span class="required">*</span> are required.</p>

    <?php echo $form->errorSummary($model); ?>

    <div class="row">
        <?php echo $form->labelEx($model,'name'); ?>
        <?php echo $form->textField($model,'name'); ?>
        <?php echo $form->error($model,'name'); ?>
    </div>

    <div class="row">
        <?php echo $form->labelEx($model,'email'); ?>
        <?php echo $form->textField($model,'email'); ?>
        <?php echo $form->error($model,'email'); ?>
    </div>

    <div class="row">
        <?php echo $form->labelEx($model,'subject'); ?>
        <?php echo $form->textField($model,'subject',array('size'=>60,'maxlength'=>128)); ?>
        <?php echo $form->error($model,'subject'); ?>
    </div>

    <div class="row">
        <?php echo $form->labelEx($model,'body'); ?>
        <?php echo $form->textArea($model,'body',array('rows'=>6, 'cols'=>50)); ?>
        <?php echo $form->error($model,'body'); ?>
    </div>

    <?php if(extension_loaded('gd')): ?>
    <div class="row">
        <?php echo $form->labelEx($model,'verifyCode'); ?>
        <div>
        <?php $this->widget('CCaptcha'); ?>
        <?php echo $form->textField($model,'verifyCode'); ?>
        </div>
        <div class="hint">Please enter the letters as they are shown in the image above.
        <br/>Letters are not case-sensitive.</div>
        <?php echo $form->error($model,'verifyCode'); ?>
    </div>
    <?php endif; ?>

    <div class="row buttons">
        <?php echo CHtml::submitButton('Submit'); ?>
    </div>

<?php $this->endWidget(); ?>

以及controller和model中的代码

public function actions()
{
    return array(
        // captcha action renders the CAPTCHA image displayed on the contact page
        'captcha'=>array(
            'class'=>'CCaptchaAction',
            'backColor'=>0xFFFFFF,
        ),
        // page action renders "static" pages stored under 'protected/views/site/pages'
        // They can be accessed via: index.php?r=site/page&view=FileName
        'page'=>array(
            'class'=>'CViewAction',
        ),
    );
}
class ContactForm extends CFormModel
{
	public $name;
	public $email;
	public $subject;
	public $body;
	public $verifyCode;

	/**
	 * Declares the validation rules.
	 */
	public function rules()
	{
		return array(
			// name, email, subject and body are required
			array('name, email, subject, body', 'required'),
			// email has to be a valid email address
			array('email', 'email'),
			// verifyCode needs to be entered correctly
			array('verifyCode', 'captcha', 'allowEmpty'=>!extension_loaded('gd')),
		);
	}

	/**
	 * Declares customized attribute labels.
	 * If not declared here, an attribute would have a label that is
	 * the same as its name with the first letter in upper case.
	 */
	public function attributeLabels()
	{
		return array(
			'verifyCode'=>'Verification Code',
		);
	}
}