WordPress MU

I have Wordpress mu running but I don't understand
how to make user create his own blog through my blog.

How make a user to enter to the Wp panel?
He has to do it?

To register, point a link at /wp-register.php.

To login, point a link at /wp-login.php.

Last time I checked, the home theme had these links already.

Register is wp-signup.php, not wp-register. ;)

Why when I click on wp-signup.php, appears me:

Registration has been disabled.

In the backend, go to Site Admin -> Options. Find the radio buttons to allow registration. Save.

@jagalizzi: Possibly because registration has been disabled by the admin? Log in as admin (/wp-admin.php) then navigate to Settings/General

Under General Settings, take a look at the Membership section. You will see a check box that is probably unchecked ("Allow User Registration"). If you check it and save your changes, you should be able to signup (assuming everything else is ok, haha)

@andrea_r: doh! beat me to it!

On a new install, it's disabled by default, I think. :) So you can work away without users and sploggers signing up until you're ready.

Thank you. It's already done I think.
Now, this is my page:
http://energyenhancement.org/Spiritual-Blogs/

Haw can I do to put the sign up link into sidebar (where it says meta)?

Just so you know, in your header, 'mith' should be spelled "myth".

I found in General Settings:
Membership, a check box where says

Users must be registered and logged in to comment

I checked and saved but the sign up link doesn't appear.

Can i add it using a code?

"I checked and saved but the sign up link doesn't appear."

It doesn't make the link appear anywhere. Yes, you have to add the link somewhere to your main blog theme.

Ok, this a part of the sidebar code where the links are:

<?php /* Widgetized sidebar, if you have the plugin installed. */
if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar(4) ) : ?>

<?php wp_widget_categories(array(
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => '',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h2>',
)) ?>

<?php wp_widget_recent_entries(array(
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => '',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h2>',
)) ?>

<?php wp_widget_recent_comments(array(
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => '',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h2>',
)) ?>

<?php wp_widget_Meta(array(
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => '',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h2>',

)) ?>

<?php //wp_list_bookmarks(); ?>

<?php endif ?>

How can I do to agragate the link?

Are you using sidebar widgets? if so, and code you add to that sidebar will "dissapear" as soon as you place a widget there.

open up a text widget in the backend of your main blog.
drag it to your sidebar.
type in:

<a href="http://yoursitename.com/wp-signup.php">Get your own blog here</a>

Save.

Ok, thank you.
I believe It's done.