Empty /opt/piratebox/www/board/config.pl and Kareha files not found

Hi,

I installed the image of Piratebox on my raspberry + B following the guide, and everything worked perfectly until the activation of kareha, but when I type:

vi /opt/piratebox/www/board/config.pl

the file is empty or perhaps is not present (the editor shows me a blank screen).
If I try to type http: //piratebox.lan/board/kareha.pl the browser shows me the screen to download the file.

I realized that if I try to transfer files on the USB stick, as suggested here:
http://piratebox.cc/raspberry_pi:mods
when I type
mv /opt /piratebox/share/board/src/mnt/usbdrive/kareha_uploads
the error is:
"mv: can not stat '/ opt / piratebox / share / board / src': No such file or directory".

The image that I downloaded with torrent is: [downloads.piratebox.de].

Can you help me to activate kareha?
Thanks