求各位帮忙看看哪里出问题了？

控制器代码如下：
<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Form extends CI_Controller{

public function index(){
    $this->load->helper(array('form','url'));

    $this->load->library('form_validation');//验证初始化函数

    $this->form_validation->set_rules('username', 'Username', arrary($this->users_model, 'valid_username'));
    $this->form_validation->set_rules('password', 'Password', 'required');
    $this->form_validation->set_rules('passconf', 'Password Confirmation', 'required|matches[password]');
    $this->form_validation->set_rules('email', 'Email', 'required|valid_email|is_unique[users.email]');
    //级联规则

    if ($this->form_validation->run()==FALSE)
    {
        $this->load->view('test/myform');
    }
    else{
        $this->load->view('test/formsuccess');
    }
}

public function username_check($str)
{
    if($str=='test'){
        $this->form_validation->set_message('username_check', 'The {field} field can not be the word "test"');
        return FALSE;
    }
    else{
        return TRUE;
    }
}

}
视图代码如下：
<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Form extends CI_Controller{

public function index(){
    $this->load->helper(array('form','url'));

    $this->load->library('form_validation');//验证初始化函数

    $this->form_validation->set_rules('username', 'Username', arrary($this->users_model, 'valid_username'));
    $this->form_validation->set_rules('password', 'Password', 'required');
    $this->form_validation->set_rules('passconf', 'Password Confirmation', 'required|matches[password]');
    $this->form_validation->set_rules('email', 'Email', 'required|valid_email|is_unique[users.email]');
    //级联规则

    if ($this->form_validation->run()==FALSE)
    {
        $this->load->view('test/myform');
    }
    else{
        $this->load->view('test/formsuccess');
    }
}

public function username_check($str)
{
    if($str=='test'){
        $this->form_validation->set_message('username_check', 'The {field} field can not be the word "test"');
        return FALSE;
    }
    else{
        return TRUE;
    }
}

}
另一个页面：
<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Form extends CI_Controller{

public function index(){
    $this->load->helper(array('form','url'));

    $this->load->library('form_validation');//验证初始化函数

    $this->form_validation->set_rules('username', 'Username', arrary($this->users_model, 'valid_username'));
    $this->form_validation->set_rules('password', 'Password', 'required');
    $this->form_validation->set_rules('passconf', 'Password Confirmation', 'required|matches[password]');
    $this->form_validation->set_rules('email', 'Email', 'required|valid_email|is_unique[users.email]');
    //级联规则

    if ($this->form_validation->run()==FALSE)
    {
        $this->load->view('test/myform');
    }
    else{
        $this->load->view('test/formsuccess');
    }
}

public function username_check($str)
{
    if($str=='test'){
        $this->form_validation->set_message('username_check', 'The {field} field can not be the word "test"');
        return FALSE;
    }
    else{
        return TRUE;
    }
}

}
但是不能显示效果，显示页面不存在。