Текст заголовка сообщения полностью: и видимо, только с USB II кабелем будет работать (у меня ISE10 только на серверах, проверить не могу)

Platform Cable USB II contains a 64-bit electronic serial
number used by applications to uniquely identify and access
a specific USB cable when multiple USB cables (up to 127)
are connected to the same host. iMPACT provides a dialog
box (Figure 6, page 6) allowing users to select a specific
cable from a list of attached cables. When one of the cables
in the list is highlighted, the status LED on the appropriate
cable blinks, allowing users to make a logical-to-physical
association. When the desired cable is connected and the
dialog box closed, the status LED no longer blinks.