Sony MZ-R55

Fix:  The symptom occurs where large branded computer 
manufacturers ship their systems with a cutdown OEM version of 
Windows that does not always include all the USB audio 
components. Because this is specific to each manufacturer, you will 
need to contact the one who built your system and ask them to send 
you a USB audio upgrade to bring your version of Windows up to the 
same standard as the retail version. The PCLink does not need any 
special device drivers, using only the following generic Windows 
ones that are usually stared in the listed directions for each USB 
component:

C:\win\inf\usb.inf – driver location for USB Composite Device
C:\win\inf\hiddev.inf – driver location for USB Human Interface 
Device
C:\win\inf\wdma_usb.inf – driver location for USB Audio Device

Even though these drivers may be present on your system, if the 
OEM version of Windows you are running does not contain all the 
underlying USB audio components, you will not be able to select 
USB Audio Device as the preferred playback device in the 
Multimedia Window. You will need to contact the supplier of your 
system to obtain an upgrade patch that brings your entire USB audio 
system up to the minimum specification of the retail version of 
Windows.

Problem:  When you plug in the PCLink, it is not automatically being 
configured as preferred audio device.