According to Windows Compatibility Center that device is not compatible with Win8.1/Win8
http://www.microsoft.com/en-in/windows/compatibility/CompatCenter/ProductDetailsViewer?Name=Rocksmith%20Learn%20To%20Play%20Guitar%20And%20Bass...
http://www.microsoft.com/en-in/windows/compatibility/CompatCenter/ProductDetailsViewer?Name=Rocksmith%20Learn%20To%20Play%20Guitar%20And%20Bass...