Arduino UNO (Atmega8u2) and Windows CE driver

Hi,
with all the "old" FTDI Arduino,I've no problem to use it on a Windows Ce device,FTDI release the driver for this platform.
But now,with new Arduino UNO and his Atmega8u2 chip,my Windows Ce 4 device ask me for a driver...
What I can do?
I've not found any driver of Atmega for this platform...

Any idea?

Thank's in advance
Giorgio