Centos Apache and Directory index forbidden

Today I struggled a little bit to make directory index module working.
I'm on Centos.

Installed apache (httpd) rpm.
No changes to configuration. Nothing.

I have created a conf file /etc/httpd/conf.d/my.conf

Alias /images "/var/www/images"

<Directory "/var/www/images">
    Options Indexes MultiViews FollowSymLinks
    AllowOverride All
    Order allow,deny
    Allow from all
</Directory>

I have created the /var/www/images directory.
In this directory I don't want to put any html page. I want to use the Apache autoindex module to serve a list of files contained in this directory.

WTF autoindex not working...

And in the logs /var/log/httpd/error_log you can read

[Thu Jan 03 03:44:05 2013] [error] [client 192.168.56.1] Directory index forbidden by Options directive: /var/www/images/


The problem was that in /etc/httpd/conf.d/welcome.conf there was

Options -Indexes

So:
- you can delete such file
- you can change in +Indexes