CodeIgniter电子邮件发送问题

我创建了此电子邮件发送表单，该表单一直有效，直到我将代码更改为此（这是我的控制器）为止：

public function sendMail()
{
    $config = Array(
        'protocol' => 'smtp',
        'smtp_host' => 'ssl://smtp.googlemail.com',
        'smtp_port' => 465,
        'smtp_user' => '[email protected]',
        'smtp_pass' => 'mypass',
        'mailtype'  => 'html', 
        'charset'   => 'utf-8'
    );

    $this->load->library('email', $config);
    $this->email->set_newline("\r\n");


    $this->email->from($this->input->post('email'));
    $this->email->to('[email protected]');
    $this->email->phone($this->input->post('phone'));
    $this->email->contact($this->input->post('contact'));
    $this->email->subject($this->input->post('subject'));
    $this->email->message($this->input->post('message'));


    if( $this->email->send() ){
        redirect ('/');
    } else
    {
        show_error($this->email->print_debugger());
    }

}

和HTML / PHP部分：

<form method="post" action="<?php echo base_url('Email/sendMail'); ?>" accept-charset="utf-8" name="contactform" id="contactform">
                    <div class="col-md-6">
                        <fieldset>
                            <input name="first_name" type="text" id="name" size="30" placeholder="Név">
                            <br>
                            <input name="contact" type="text" id="contact" size="30" placeholder="Email">
                            <br>
                            <input name="phone" type="text" id="phone" size="30" placeholder="Telefon">
                            <br>
                            <input name="subject" type="text" id="subject" size="30" placeholder="Tárgy">
                            <br>
                        </fieldset>
                    </div>
                    <div class="col-md-6">
                        <fieldset>
                            <textarea name="message" cols="40" rows="20" id="message" placeholder="Üzenet, Kérdés, Kérés..."></textarea>
                        </fieldset>
                    </div>
                    <div class="col-md-12">
                        <fieldset>
                            <input type="submit" class="btn btn-lg" name="submit" id="submit" value="Üzenet Elküldése">
                    </div>
                </form>

提交后，它会显示以下消息：消息：也在电话等中调用未定义的方法CI_Email :: contact（）。

预先感谢您的帮助！