[PROBLEM] Xbian + TvHeadend Server and Add On Xbmc

[enrydgl]

Hi at all,
I have RaspBerry Pi Mod B with OS Xbian.

Other informations :
1 - OS Linux xbian 3.6.11+ #10 PREEMPT Thu Jan 3 20:53:38 CET 2013 armv6l GNU/Linux
Xbian Version : 1.0a4
XMBC version : 12.0-Rc1 Git:20121212-afbae11(Compiled Dec 13 2012)
2 - Overclock set on Xbian.
arm_freq=840 core_freq=375 sdram_freq=400 over_voltage=0
3 - Power = USB Hub 4 port. Microusb connected from HUB to Raspberry power and USB.
4 - DVB-T HD connected USB Hub. Avermedia Volar Green A835
5 - Network = LAN 10/100
6 - SD - Speed normal - 4 Gb - SanDisk

Problem :
I have install last TvHeaded version : HTS Tvheadend 3.3.465~g79c134f
I have USB DVB-T HD decoder : Avermedia Volar Green A835. It's working fine in raspberry. Instruction DMESG return this on usb device :
http://pastebin.com/VrVzqUzA

I have license MPEG-2 SSH :
Istruction : vcgencmd codec_enabled MPG2
Return : MPG2=enabled

In XBMC xbian I add plugin TvHeadend Client : IP : localhost (127.0.0.1).
Now XBMC download Channels and EPG correctly.

When I execute a DVB-T Channel audio work for 5 seconds and Video doesn't work.
Some times, after 5 raspberry reboots Video work and Audio work for only one channel... when I switch channel return black screen.. it doesn't work.

TvHeadend Server Log return :
http://pastebin.com/qU1ZTuWx

XBMC Log under directory : /home/xbian/.xbmc/temp/xbmc.log report debbuger active (3 channels test) :
http://pastebin.com/kYkaFUUy

Any idea to solve problem?