is the driver from the cd or from microsoft default? if its the
MS default, i recommend you to download this driver and run it so
that it can update your current version of driver provided by
MS.
and also, this:
http://broadband.motorola.com/consumers/products/SB5101/downloads/SB5101_UG_EN.pdf
the user manual guide.if your haven't read it go read it first. it
teaches you how to set up connection using your modem in different
OS platforms