> I am behind a firewall with a proxy server, but it 
is 
> configured to go to the internet. Whenever I give a 
> address like : <http://www.yahoo.com>, it downloads 
all 
> the related files, but when I use 
> <http://www.nondot.org/sabre/os/articles>, it says, it 
> reports with MIRROR ERROR, saying it didnot find the 
> first page, or there is a connection problem. In 
> contrast to this, I would like to mention that, when 
I 
> use another offline browser, it downloads the 
> necessary files.

Hum, that's right : HTTrack is being filtered by this 
site, maybe because some users abused the bandwidth 
(or downloaded too many times the site)
If you change the brower id/switch off robots.txt, 
PLEASE setup reasonnable parameters (1 simultaneous 
connection AND bandwidth limit of 15KB/s, for example, 
to avoid any server overload!)