Hello

Have you installed h-e-n previous before installing mouse support?
To my opinion you have to install h-e-n. From h-e-n try different speed modes. Experimentally i identified that not all devices boot up, power up in each speed mode in our case mouse turns it's laser led on.
Than you should press enumerate. I might be mistaken but enumerate don't always from start find device (mouse). Maybe you should press enumerate once again.

p.s.
I have another problem. I can't install package at all
extkbd installed and working fine.
I receive:
The following packages have unmet dependencies:
extmou: Depends: libxmuu1 (>= 1.0.4-1) but it is not installable
E: Broken packages

There is only libxmuu-dev In development repository on 5th august 2014, no libxmuu.
I understated that there is libxmu6 that is lighter version of libxmuu, correct?
It is installed (which app installed it I don't know)
What I should do in this case?
Thank you

I downloaded and tried to install it.
libxmuu1_1.0.4-1_armel.deb
And I receive conflict. In package preferences I see: "incompatible application package".
In log when I try to install it I see:
Package must have "Section: user/FOO" to be considered compatibile

edited:
-----------

dpkg -i libxmuu1_1.0.4-1_armel.deb
it rules packages installed