hi Nero FX,
thanks for your good hint.
Driver in the programm directory - new one
Driver in the windows32/drivers directory - new one
looking in the registry - only new one - entries
looking in the driverstore I found the new one [B]and the old one[/B]
stop caching, deleting the old entry with the tool pnputil.exe,
reboot, start caching, reboot, reboot …