title: set_value in codeigniter not responding
body: <p>I am new to the codeigniter and i am trying its tutorials from the user guide. But i just got stuck in one place. In the code of the form validations. I am trying its example for the set_value property but my user text box is not returning anything.</p>
  
  <p>In my view i added the following code:</p>
  
  <pre><code>&lt;?php echo validation_errors();?&gt;
  &lt;?php echo form_open('form');?&gt;
  &lt;table border="0"&gt;
  &lt;tr&gt;
      &lt;td&gt;&lt;h5&gt;Username&lt;/h5&gt;&lt;/td&gt;
      &lt;td&gt;&lt;input type="text" name="username" value="" size="50" value="&lt;?php echo set_value('username'); ?&gt;" /&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
      &lt;td&gt;&lt;h5&gt;Password&lt;/h5&gt;&lt;/td&gt;
      &lt;td&gt;&lt;input type="password" name="password" value="" size="50" accept=" &lt;?php echo set_value('password'); ?&gt;" /&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
      &lt;td&gt;&lt;h5&gt;password Confirm&lt;/h5&gt;&lt;/td&gt;
      &lt;td&gt;&lt;input type="password" name="passconf" value="" size="50"  /&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
      &lt;td&gt;&lt;h5&gt;Email Addres&lt;/h5&gt;&lt;/td&gt;
      &lt;td&gt; &lt;input type="text" name="email" value="" size="50" accept="&lt;?php echo set_value('email'); ?&gt;" /&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
      &lt;td&gt;&amp;nbsp;&lt;/td&gt;
      &lt;td&gt;&lt;div&gt;&lt;input type="submit" value="Submit" /&gt;&lt;/div&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;/table&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>and in my controller i added the following code:</p>
  
  <pre><code>function index()
  {
      $this-&gt;load-&gt;helper(array('form', 'url'));
  
      $this-&gt;load-&gt;library('form_validation');
  
      $this-&gt;form_validation-&gt;set_rules('username','username','required|min_length[5]|max-length[10]|xss_clean');
      $this-&gt;form_validation-&gt;set_rules('password','password','required');
      $this-&gt;form_validation-&gt;set_rules('passconf','password confirmation','required');
      $this-&gt;form_validation-&gt;set_rules('email','email','required');
  
      if ($this-&gt;form_validation-&gt;run() == FALSE)
      {
          $this-&gt;load-&gt;view('myform');
      }
      else
      {
          $this-&gt;load-&gt;view('formsucces');
      }
  }
  </code></pre>
  
  <p>Thank You in advance.</p>