Yii, got Error in yii-simple-mailer

Hi… I got following error when i am using yii-simple-mailer. I don’t know how to solve this?

I have done There are two way to connect this mailer,

  1. add following in components,

‘mailer’ => array(

    // for smtp


    'class' => 'ext.mailer.SmtpMailer',


    'server' => 'smtp.163.com',


    'port' => '25',


    'username' => 'your username',


    'password' => 'your password',





    // for php mail


    'class' => 'ext.mailer.PhpMailer',


),
  1. after that i add this Yii::app()->mailer->send($to, $subject, $content); in my page.

But i got following error

<h1>CException</h1>

<p>Property “CWebApplication.mailer” is not defined. (/var/www/kg/yii/framework/base/CComponent.php:130)</p><pre>#0 /var/www/kg/yii/framework/base/CModule.php(105): CComponent->__get(‘mailer’)

#1 /var/www/kg/kgcp/protected/controllers/SiteController.php(248): CModule->__get(‘mailer’)

#2 /var/www/kg/yii/framework/web/actions/CInlineAction.php(49): SiteController->actionContact()

#3 /var/www/kg/yii/framework/web/CController.php(308): CInlineAction->runWithParams(Array)

#4 /var/www/kg/yii/framework/web/CController.php(286): CController->runAction(Object(CInlineAction))

#5 /var/www/kg/yii/framework/web/CController.php(265): CController->runActionWithFilters(Object(CInlineAction), Array)

#6 /var/www/kg/yii/framework/web/CWebApplication.php(282): CController->run(‘Contact’)

#7 /var/www/kg/yii/framework/web/CWebApplication.php(141): CWebApplication->runController(‘site/Contact’)

#8 /var/www/kg/yii/framework/base/CApplication.php(184): CWebApplication->processRequest()

#9 /var/www/kg/kgcp/index.php(28): CApplication->run()

#10 {main}</pre>