Email CSV Attachment receives empty in Outlook 2013

I have received No Data CSV attachment email in Outlook 2013 only but got a CSV with data on gmail and other mails.

I have used the following CakePHP code:

            $this->Email->reset();
            $fileatt = ROOT . DS . APP_DIR . DS . WEBROOT_DIR . DS;
            $this->Email->to =array('ram@xyz.com');
            $this->Email->cc =array('ram@gmail.com');
            $this->Email->subject = "CSV mail";
            $this->Email->from = "info@gmail.com";
            $this->Email->sendAs = 'html';
            $this->Email->filePaths  = array($fileatt);
            $this->Email->attachments =array("Sample.csv");
            $this->Email->charset = "utf-8";
            $this->Email->headerCharset = "utf-8";
            $message = "Hi Thanks!";
            $this->Email->send($message);

Help me to resolve this.
Thanks.

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