Tank you for your quick answer.
I already tried the filter you were suggesting.
I found the setting that was blocking download, but I 
cannot understand what exactly is the meaning of that 
check.
Pressing the key SET OPTIONS, FLOW CONTROL tab, the ckack 
PERSISTENT CONNECTIONS (KEEP-ALIVE) was checked.
When I removed this check everything returned OK.
It's strange, because I just re-installed the program on a 
fresh-formatted PC, so settings had to be defaulted.
I then setted HTTrack to download the pages I asked you 
for, starting one lever higher, with the 15 lines filter I 
already used and it grabbed perfectly.
Best regards,
Gandalf