Are you sure its 64bit and not 32bit version of win 7? The 64bit driver wont work with a 32bit os and vice versa. Also you can force hardware install and see if you even have the driver on there.
follow this but when you get to browse for software driver choose let me pick from list of device on drivers
then go down to phillips and choose 900nc
http://www.addictivetips.com/windows...windows-vista/