$this->email->send() returns nothing

[eluser]redcloud80[/eluser]
Why $this->email->send() returns nothing (blank html)?

Code:

public function __construct()
{
  parent::__construct();
  $this->load->library('email');
}

public function send_confirmation_email()
{
  $user_email =  '[email protected]';
  
  $this->email->from('[email protected]', 'ttt');
  $this->email->to($user_email);
  $this->email->subject('Registration confirmation');
  $this->email->message('Please click this link to confirm your registration ');
  
  die($this->email->send());
}

This is my email.php config file

Code:

$config['protocol'] = 'smtp';
$config['charset'] = 'iso-8859-1';//'utf-8';
$config['mailtype'] = 'text';

$config['smtp_host'] = 'smtp.gmail.com';
$config['smtp_user'] = '[email protected]';
$config['smtp_pass'] = 'mypass';
$config['smtp_port'] = 465;
$config['smtp_timeout'] = 5;

Any idea?