W systemie Win XP 64 bit pewnie brakuje Tobie tego
http://www.opendll.com/index.php?file-download=winusb.dll&arch=64bit&version=6.1.7600.16385&dsc=Windows-USB-Driver-User-Library
http://www.opendll.com/index.php?file-download=winusb.dll&arch=64bit&version=6.1.7600.16385&dsc=Windows-USB-Driver-User-Library