public function registerUser()
    {
        // registered new user ?
        if ($this->createUser() != false && $this->_blIsNewUser) {
            if ($this->_blNewsSubscriptionStatus === null || $this->_blNewsSubscriptionStatus) {
                return 'register?success=1';
            } else {
                return 'register?success=1&newslettererror=4';
            }
        } else {
            // problems with registration ...
            $this->logout();
        }
    }