I reinstalled Windows 7 to x64 version on my XPS Studio 1640. I am unable to find the driver that will get the CD eject button on the touch panel above the keyboard to work. http://www.flickr.com/photos/icelava/3889335115/in/set-72157622128626441/ It will not eject the inserted CD/DVD and i have to resort to issuing the command via Windows Explorer.

The volume, media play controls, and wireless toggle buttons on the panel do work, however.