> I have try to "capture" it, but when I try to
> "login"of this site on my computer, I only get
> "computer-language".
> 
> The site I wish to have is: 
> <http://glashobby.forumup.nl/>

Go to the log in page:
<http://glashobby.forumup.nl/login.php?mforum=glashobby>
Capture the log in by following HTTrack Help: Authentication
<http://httrack.kauler.com/help/Authentication>

Don't forget to filter out the log out url.