so… I have called with Steinberg and …conclusion (1€/min)
Again money …for no proper sollution ???
AND …
Nothing, if you have a XF driver installed then you can’t install the driver for the CC121,there is no proper sollution for it at this moment .
I’m working with the CC121 and I have the driver now for the XF (2 times installed)
bud I see in cubase 6 my CC121 ,and ion windows-7 I see YAMAHA WDM
and everything is working
So steiberg; you’v got stll work to do, to make a proper driver for the CC121 
end of investigation 