Big Prbolem with "Your password is the same as your username"

[Ebi_P]

Thanks.

i found it but how should it modify?
i don't know which part must be start with // or another modification to resolve this problem:
=========================================

// password same as username?
if (!defined('ALLOW_SAME_USERNAME_PASSWORD') AND $vbulletin->userinfo['userid'])
{
// save the resource on md5'ing if the option is not enabled or guest
if ($vbulletin->userinfo['password'] == md5(md5($vbulletin->userinfo['username']) . $vbulletin->userinfo['salt']))
{
if ((THIS_SCRIPT != 'login' AND THIS_SCRIPT != 'profile') OR (THIS_SCRIPT == 'profile' AND $_REQUEST['do'] != 'editpassword' AND $_POST['do'] != 'updatepassword'))
{
eval(standard_error(fetch_error('username_same_as_ password',
$vbulletin->session->vars['sessionurl']
)));
}

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