WP Multisite, 1and1 and subdomains

Hi to all,

I would appreciate if you could help me.
I tried to search related post but I can’t find a reasonable solution.

I have my shared server on 1and1 (http://www.asturies-msc.com) with a fresh install of WordPress 3.4.2.
I activate WP MU following codex instructions, and I choose the subdomains option (Despite the wildcards DNS warning)
I have created in 1and1’s cPanel a new subdomain: http://caph.asturies-msc.com (pointing main directory folder) and created the new site in WP dashboard.

If you go to the new site (http://caph.asturies-msc.com) , you could see that It apparently works… but if you click on any link, it will show a 404-error.
The most strange thing is that the Caph’s Dashboard with http://caph.asturies-msc.com/wp-admin/ URL Works!

This is my .htaccess:

# BEGIN WordPress
<IfModule mod_rewrite.c>

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule . index.php [L]
</IfModule>

# END WordPress

And my wp-config Multisite lines:

define( 'MULTISITE', true );
define( 'SUBDOMAIN_INSTALL', true );
$base = '/';
define( 'DOMAIN_CURRENT_SITE', 'www.asturies-msc.com' );
define( 'PATH_CURRENT_SITE', '/' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

¿Any help?

Thank in advance