Well, it looks like it should work fine - up to Windows 7 64-bit anyways. Their drivers page does not show any drivers for Windows 8 and you did not indicate what OS you are running, so that's the best I can tell you for the moment.
Here is the link for the downloads page, for the drivers - also there seems to be a firmware update too:
http://www.alesis.com/multimix8usb20 Hope that helps, and good luck with it all.
Bob Bone