To solve these kinds of issues, I suggest you use cURL. This is a command line tool in linux / unix and I suppose there are equivalents in other operating systems.
cURL lets you see what the server is returning in terms of headers or output without all the interference of a browser. In this case I use curl -I [url] which shows me just the headers that are returned.
I ran curl -I [url] on the links you provided and they are all returning 302 Temporary Redirect, redirecting the user to other URLs. This could be a problem with your apache configuration or with your CMS.
Here's the output.
greg@greg-desktop:~$ curl -I http://www.tkdmontecatini.com/it/photogallery
HTTP/1.1 302 Moved Temporarily
Date: Sun, 13 Nov 2011 07:21:37 GMT
Server: Apache mod_fcgid/2.3.6 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHPSESSID=4d70b639d7aabf8a2f42c57c595f7610; path=/
Location: /it/photogallery
Vary: Accept-Encoding,User-Agent
Connection: close
Content-Type: text/html
greg@greg-desktop:~$ curl -I http://www.tkdmontecatini.com/it/pagina/9/Informazioni/Corsi/Chi-Siamo
HTTP/1.1 302 Moved Temporarily
Date: Sun, 13 Nov 2011 07:22:08 GMT
Server: Apache mod_fcgid/2.3.6 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHPSESSID=99325602d521a419e2cdf7ca279ca995; path=/
Location: /it/pagina/9/Informazioni/Corsi
Vary: Accept-Encoding,User-Agent
Content-Type: text/html
greg@greg-desktop:~$ curl -I http://www.tkdmontecatini.com/it/pagina/2/Informazioni/Eventi/Eventi
HTTP/1.1 302 Moved Temporarily
Date: Sun, 13 Nov 2011 07:22:36 GMT
Server: Apache mod_fcgid/2.3.6 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHPSESSID=aa177b2717c41d0b8deb8dc948a69df6; path=/
Location: /it/pagina/2/Informazioni/Eventi
Vary: Accept-Encoding,User-Agent
Content-Type: text/html