Probelm with images in wp multisite

Sorry to bother you again but I just checked .htaccess file and I think there is something wrong. This is what it is
<?php
/**
* Network Setup administration panel.
*
* @package WordPress
* @subpackage Multisite
* @since 3.1.0
*/

/** Load WordPress Administration Bootstrap */
require_once( ‘./admin.php’ );

if ( ! is_multisite() )
wp_die( __( ‘Multisite support is not enabled.’ ) );

require( ‘../network.php’ );

Hi Ipstenu,
This is my .htaccess file from public_html

# BEGIN WordPress
<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-(contenuti|admin|includes).*) $2 [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]
</IfModule>
# END WordPress

The one i gave you last night was the setup.php file from http://www.imparoinglese.com/wp-admin/network/setup.php.

In public_html I have also a .htaccess_bak file that is like that

# BEGIN WordPress
<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>

# END WordPress

I really don’t know how to fix this problem:((

I insert images in my posts through the media button on the post page and I upload them from my computer, they are the same images I have used on my “mother” website.
When the other day I was speaking with my server helper he asked me my wp adim login to check the setting and he said he try to change it as the thumbanil url was
http://www.imparoinglese.com/home/imparoin/public_html/wp-content/blogs.dir/2/files
While the server has
http://www.imparoinglese.com/wp-content/blogs.dir/2/files/
Maybe he did change.
I just check the setting on my “mother” website (where i don’t have any problem and the upload path is wp-content/upload

I tryed to contact my theme as well for support.
oh:(
thank you

Thank you, I will do that and hopefully it will fix it! I will let you know:)Thank you again.
Martina