Encountered the same problem when using my N3200 as well.
Make sure it installs the driver for the cable. Theres usually a
installation CD that comes with it.
You have to go Select Phone, Connection, and under the Serial Cable
(Or something containing serial, can't remember), click on options
and try every single one till it manages to detect your phone. The
one that makes your mouse cursor stay at "Busy"(Hourglass) the
longest time is the correct one. If that can't detect, disconnect
the wire physically from the phone and computer and reconnect
them.
If it can't work, restart your computer with the wires
connected.
If it still cannot detect, your cable may be spoilt.
You'll have to use IR method of connecting to your computer
then...