to the club monkeygirl
I suspect with your Z being a JDM that you don't have all the phone bits. You will need a cradle, vluetooth adaptor and the control unit. If you just have a lead with a white socket on the end in the glovebox then this is probably the case.
Some more info here and what part you need to get
http://www.350z-uk.com/forum/viewtopic.php?t=13358