Web User Login for Editing problem

Hi there!
I can’t get a User to login to do some editing. I am new at this
I used the snippet and chunk etc stated at http://rahul.rahul.net/modx-hints/modx-login-link.html
I found that I could login, but it doesn’t do anything but to change the ’login’ to ’logout darren’. It does allow me to edit as an Editor? Then when I logout, it still show the ’logout darren’ link. Then when I try to login again after I refresh, it won’t let me login again.

Cache in diabled and I have set the user and document groups and roles.
Has anybody else had this problem?

Regards,
Darren

I worked out the Logout problem:
The code:
<?php
# do the work
$user = $modx->getLoginUserName();
if ($user) {
---->>>> return ’<a href="[~10~]?webloginmode=lo">Logout ’ . $user . ’</a>’; <<<<----
} else {
return ’<a href="[~10~]">Login</a>’;
}
?>

I change the marked code line to:
return ’<a href="[~10~]&webloginmode=lo">Logout ’ . $user . ’</a>’;

I still don’t understand why the actual editor cannot edit.
Regards,
Darren