WordPress MU

I am using 2.9.2 Older versions worked. Now they have changed the sign up file

http://interactive-media-network.com/reviews/vipmember/wp- signup.php?action=registerredirect_to=%2Freviews%2Fvipmember%2F
leads to reviews and a blank page
sign up page
http://interactive-media-network.com/reviews/vipmember/wp-signup.php
leads to
http://interactive-media-network.com/reviews/wp-signup.php

http://interactive-media-network.com/reviews/vipmember/wp-login.php
register link will lead to
http://interactive-media-network.com/reviews/wp-signup.php
not recognizing the sub-domain at all.

http://interactive-media-network.com/reviews/business/wp-login.php?action=register
white screen
leads to reviews register page not the business register page
___________________________
This is the  wp-register.php MU 2.9.2

<?php
/**
* Used to be the page which displayed the registration form.
*
* This file is no longer used in WordPress and is
* deprecated.
*
* @package WordPress
* @deprecated Use wp_register() to create a registration link instead
*/

require('./wp-load.php');
wp_redirect('wp-login.php?action=register');

?>

What can I add and to what file to make it redirect to the register or sign up page of the added blog such as business, vipmember, or real-estate?
Thank you! You seem to be the only person who can help.

Yes, I saw your two other posts.

This is how mu has worked for quite a while. There is a widget somewhere that will allow people to sign up for individual blogs.

I just have to go find it .

http://wordpress.org/extend/plugins/add-users-sidebar-widget/

Unfortunately the plugin does not work. It does not provide any visible form. I have tried to find something else but have not been able to as yet. If you know how others have let people add themselves please advise.
Thank you! Maureen

This one is all I know of.

Did you look in your widgets list for the widget it adds?

It appears in the widgets but when you add it the form doesn't show. It only has Add Users but no form. It is useless. I cannot believe Wordpress MU does not allow self registration now. How do people who have memberships site do it?

Most people have users register at the main site, then manually add them to the sites in question.

Or, for money-making sites, the admins of those usually hire someone to sort it out for them.