[SOLVED] Wireless keyboard doesn't work with XBian

[Hachecode]

Software
XBian version: beta 1.1
XBMC version: don't know
Overclock settings: ---

Hardware
Power supply rating: don't know
RPi model (model A/B 256mb/512mb): RPi B 512mb
SD card size and make/type: 4gb
Network (wireless or LAN): No
Connected devices (TV, USB, network storage, etc.): TV, Wireless keyboard Rii i10

Logile
Link to logfile(s): ---

Problem description:
I have a Kano kit with Raspbian preinstalled and working fine with my keyboard. The wireless keyboard is Rii i10.

I formatted SD and installed Xbian. Keyboard doesn't work
I formatted SD and installed Raspbian again. Keyboard works fine
I formatted SD and installed Xbian. Keyboard doesn't work
I formatted SD and installed Openelec. Keyboard doesn't work
I formatted SD and installed Raspbian again. Keyboard works fine

Sometimes (not every time) keyboard works for a couple of seconds and then crashes and it doesn't work. Keyboard is battery charged.
I tried using keyboard connected wireless, no-wireless.
I tried restarting keyboard.
In Raspbian everything goes right

Any idea with this issue?

Thank you very much,
David.