Autoindex don't show directories with authbasic

[Juan Miguel Alcarria Herrera <juanmi@xxxxxxxxxxx>]

Hello
everyone, this is my first message to the list and the first thing I
want to do is say thanks, the second, sorry for my English ;-)

I have a problem with module Autoindex and module AuthBasic. 

How can I make the module Autoindex list the directories that hace authentication basic?

I have 3 diretories in the DocumentRoot:

ser
servicios_internos
www

If I do not put anything Authtpe AutoIndex list the 3 directories

If i put this configuration:

<Directory "/var/www/midominio.com/ser">
AuthName "Autenticación"
AuthType Basic
AuthUserFile /etc/.htpasswdweb
require valid-user
Options Indexes FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>

<VirtualHost *>
ServerName apache.midominio.com
ServerPath /var/www/midominio.com
DocumentRoot /var/www/midominio.com
CustomLog /var/log/apache2/servicios_internos.midominio.com.log combined
</VirtualHost>

The module Autonindex only show:

servicios_internos
www

Thanks in advance ;-)