form validation

[eluser]maniac[/eluser]
I am trying to do a login to an administration section on a website using codeigniters validation, but keep coming up with errors -

Undefined property: CI_Loader::$validation

Trying to get property of non-object

both on my view page, but can't seem to see where I have gone wrong (reading user guide for libraries and validation), so any help would be appreciated.

My view page -

Code:

<?php echo $this->validation->error_string; ?>
  
      <?php echo form_open('form'); ?>
  
      <p>User Name
      &lt;input type="text" name="username" value="&lt;?php echo $this-&gt;validation->username;?&gt;" /></p><br />
  
      <p>Password
      &lt;input type="password" name="password_2" value="&lt;? echo $this-&gt;validation->password_2;?&gt;" /></p>
      <br />
      &lt;input type="submit" name="submit" value="submit" /&gt;&lt;/p>
    &lt;/form&gt;

my controller -

Code:

function form()
        {
      $this->load->helper(array('form','url'));
      $this->load->library('validation');
      
      $rules['username']="trim|required|xss_clean";
      $rules['password_2']="trim|required|xss_clean";
      
      $this->validation->set_rules($rules);
      
      $fields['username']='username';
      $fields['password_2']='password_2';
      
      $this->validation->set_fields($fields);
      
      if($this->validation->run()==FALSE)
      {
        $this->load->view('adminLoginView');
      }
      else
      {
        $this->load->view('admin');
      }
    }

Thanks,
Maniac