Tvheadend

Hi every body,
I m new to this forum, and also the use of raspberry based media centers.
actually I m trying to set up my raspberry to be able to watch live tv using an USB tv tuner (CINERY TStick rc).
Here is my setup :
raspberry pi 2 running Xbian
CINERGY TStick rc usb tuner.

I've installed successfully the TVheadend server, and set it to run on start up following this tutorial (http://coder36.blogspot.fr/2012/11/tvheadend-on-raspberry-pi.html?m=1), now I can log on the configuration menus using IP:9981. Also i can search for channel and map them so they are detected by kodi.

The problem is the following:
the raspberry is connected directly to my laptop (i turn my ethernet to router mode, since i don't have a router). So I log to the configuration interface from my laptop. The problem is when i unplug the the ethernet cable, channel list on kodi becomes empty as if the listed is saved on my pc and not the raspberry. Does anyone has any idea about this ?

Thanks inadvance