CSRF token could not be verified (CSRF Validation)

Selamat siang gan,
Minta bantuanya soal Yii Framework versi 1. Disini saya meng-aktifkan CSRF Validation. Tapi pas saya coba login (form submit dengan method post). Dia malah keluar error :

“The CSRF token could not be verified.”

Padahal sudah saya cek di view page source ada input hidden untuk token nya. jadi bingung. mohon bantuannya. Terimakasih banyak.

CATATAN :

  • config/main.php
    ‘request’=>array(
    ‘enableCookieValidation’=>true,
    ‘enableCsrfValidation’=>true,
    ‘csrfTokenName’=>‘simasdasecuretoken’,
    )

  • form login html
    <?php echo CHtml::form(array('site/auth')); ?>
    <div class="input-group">
    <span class="input-group-addon"><i class="fa fa-user"></i></span>
    <input type="text" name="LoginForm[username]" placeholder="username" class="form-control" autocomplete="off">
    </div>

    <div class="input-group">
    <span class="input-group-addon"><i class="fa fa-lock"></i></span>
    <input type="password" name="LoginForm[password]" placeholder="password" class="form-control" autocomplete="off">
    </div>

<!-- <div class="checkbox i-checks m-t-md">
<label>
<input type="checkbox" name="LoginForm[rememberMe]" value="1"><i></i> Remember me
</label>
</div> -->

<button type="submit" class="btn btn-theme btn-fill btn-block" style="margin-top: 20px;">LOGIN</button>
<?php echo CHtml::endForm(); ?>

-View page source dari form login