Guide: rTorrent + ruTorrent installation

[Enderswood]

hi
first of all, sorry for my english, hope you will understand me

then, some info :
raspbery Pi B+
Xbian


i have follow all steps carefully and everything work ! ... almost fine

after a while, my rtorrent seems to simply crash, i ssh and do "ps aux | grep rtorrent", and of course found nothing....
when it happened, i tried to launch rtorrent again by enter "rtorrent" (thx captain obvious) and ... :
rtorrent: Error in option file: ~/.rtorrent.rc:77: Could not prepare socket for listening: Adresse déjà utilisée (adress already used)

as a perfect linux noob, i have look everywhere with my google skill and found nothing... so i have try change the scgi part like if i want couchpotato as explain in page 2, but i had to comment the 2 lines under scgi_local like :
# scgi_local = /tmp/rtorrent.sock
# execute = {sh,-c,/bin/chgrp www-data /tmp/rtorrent.sock}
# execute = {sh,-c,/bin/chmod g=rwx /tmp/rtorrent.sock}

was not told, so perhaps not a good idea, but if i dont, i have a line 76 error... with these changes, rtorrent command work and i have the shell gui that apear, and he webui back online too.

problem is...

[30.12.2014 22:47:17] scheduler: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] datadir: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] trafic: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] retrackers: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] create: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] _task: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] history: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] source: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] screenshots: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] edit: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] data: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] rutracker_check: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] mediainfo: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] autotools: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] erasedata: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.
[30.12.2014 22:47:17] unpack: ruTorrent and rTorrent must be installed on the same host. Plugin will not work.

... any clue for a reaaaaalll noob ? :/