Call Back Function Issue

[eluser]everythingevolves[/eluser]
Cheers for this mate...

Code:

<div id="content_center">
<h1>Registration</h1>
&lt;?php echo validation_errors(); ?&gt;

&lt;?php echo form_open('register'); ?&gt;

<p>Forename</p>
&lt;input type="text" name="forename" value="&lt;?php echo set_value('forename'); ?&gt;" size="50" /&gt;

<p>Surname</p>
&lt;input type="text" name="surname" value="&lt;?php echo set_value('surname'); ?&gt;" size="50" /&gt;

<p>Username (email address)</p>
&lt;input type="text" name="email_login" value="&lt;?php echo set_value('email_login'); ?&gt;" size="50" /&gt;

<p>Password</p>
&lt;input type="password" name="password" value="" size="50" /&gt;

<p>Password Confirm</p>
&lt;input type="password" name="passconf" value="" size="50" /&gt;

<p>&lt;input type="submit" value="Submit" /&gt;&lt;/p>

&lt;/form&gt;
</div>

I should mention that all other errors display the right error message except for this one.