Firmware update -- no (-)

I am trying to update my firmare, but nothing happens if I hold down (-) volume and insert my device into the USB port.  Otherwise it appears the device is working fine.  Is the an alternate way to doing this?

I have the Express 2GB and am running Windows Vista.

Explicitly change the default to MSC mode.

http://forums.sandisk.com/sansa/board/message?board.id=express&thread.id=3002

Once this is done, then run the firmware update.

One thing to note for anyone trying this. Be sure and continue to hold the VOL- button after plugged in until screen activates. Then you may release the button.