magic mouse multitouch surface is not working

Suddenly all the gestures of the magic mouse stop working.

I can click and double click, but all the gestures like scrolling, double tap, single tap are not working.

I've disabled all gestures, restarted, enabled all gestures but nothing works.

I've reset SMC and PVRAM, and nothing.

How I can check if what fail is the multitouch surface, for sure?

OS: Yosemite 10.10.2

iMAC 21.5" mid 2011 12GB RAM.

I've tried to use the magic mouse with another mac, my daughter mac mini, but the gestures are not working on that mac either.

I've not tried checking on another mac with Mountain Lion or earlier OS X. I've not tried another magic mouse.