Multisite with subfolder in folder

I’ve installed WP in this map http://www.chabelle.be/WP/
And now I would like the have the other 2 subfolders created.

Exactly I mean folder. Sorry for this confusion!

Hi Ipstenu.

I’ve done some changes yesterday. I’ve installed WP in the rooth folder. And I want to create 2 ‘sub-sites’ in the network. And I want to use the sub-directory option to do this.

so WP install => http://www.chabelle.be
2nd site => http://www.chabelle.be/cbs
3th site => http://www.chabelle.be/b2b

Still the same problem when I want to access the other 2 sites:
/—message—/
“Not Found
The requested URL /cbs was not found on this server.”
/—message—/

! Attention: if you visit chabelle.be for the moment, it redirects to chabelle.be/chabelle for the visitors, so they can still access the ‘old’ website. (done this with redirection plugin).

Data from .htaccess file:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]
</IfModule>

Thanks already for helping me! If you need any further information…
Hope this can be solved quick.

I think it has something to do with the hosting.
I’ve noticed that the clean permalinks also don’t work…
When I turn of the redirect, it’s just the same.

Although thanks for searching!