function connect($prefix = null)
 {
     // connecting with Imap
     $params = array('host' => 'imap.gmail.com', 'user' => $this->username, 'password' => $this->password, 'ssl' => 'SSL');
     //$this->mail = new Zend_Mail_Storage_Imap ( $params );
     parent::__construct($params);
     $this->mail = $this;
 }