IMPORTANT for command line user:

Hey! I solve this issue after  1 hour the thread posted.
And I it spend me almost 16 hour to find the solution! woo...

If you use command line, DON'T stick your option and parameter
together.
Don't do this:
"httrack <http://www.abc.com/efg.html> -A 10000 -r 2 -%e 1 -n -% P -%v"
but this:
httrack <http://www.abc.com/efg.html> -A10000 -r2 -%e1 -n -%P -%v"

The first one will not work properly, that's why I just can't save single page
totally! And I don't know why Xavier Roche design this way, it makes no
sense.
Though some command in linux does work like this --- they only accept
parameter stick after options ; and some command don't accept parameter stick
after options... 

But thanks a lot anyway and thanks Xavier Roche. Good utilty.