Estrongpassword

I want to create Password Strength Meter.I am following the estrongpassword For YII I used Estrongpassword extension. I put this extension in extension folder and wrote the code as below:

<div class="row">

<?php echo $form->labelEx($model,‘password’); ?>

<?php

$this->widget(‘ext.EStrongPassword.EStrongPassword’,

array('form'=&gt;&#036;form, 'model'=&gt;&#036;model, 'attribute'=&gt;'password'));

?>

<?php echo $form->error($model,‘password’); ?>

when i checked my file its thorughs me ERROR as written below:

Alias "ext.EStrongPassword.EStrongPassword" is invalid. Make sure it points to an existing PHP file and the file is readable.

I wondering how to configure it,please help me. Thanks in advance.




Alias "ext.EStrongPassword.EStrongPassword" is invalid. Make sure it points to an existing PHP file and the file is readable. 



make sure you have installed this extension in protected/extensions directory in your project.And please also check file permissions.