Failed To Send Mail From Yii...

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In my sitecontroller.php

I have this method:

public function actionContact()

This has to send a mail to adminmail.

mail(Yii::app()->params[‘adminEmail’],$subject,$model->body,$headers)

But, when i submit the views/contact.php form it’s not sending any mail to adminmail.

here,How can i send this mail from contact.php to my adminmail?

here is my models/ContactForm.php:

here is my Controllers/SiteController.php:

Post codes here not on pasted bin!