You have to call Cadlink to see what is the name of the proper driver. Not being in front of the machine and seeing the choices will make it difficult for anybody else - unless they have a Lynx - and most that do, won't have SignLab.
It depends what version of OS (operating system) your running. XP pro w/SP2 will find your cutter as a printer when you plug it into the USB port....make sure you plug it into 1 or 2....SP supports USB2 which has faster data transfer. So if you have XP w/SP2 when you plug in your cutter/printer a dialog box will pop up and ask you to install new hardware....next or yes then pick no install manually then pick I have disk...that is when you put in the driver disk you got with your lynx.
Signlab should see this if not then you can install the cutter/printer from signlab. They have no listing of Lynx in the supported drivers that comes bundled with 6.5 anyway so you will probably have to call Cadlink to find out where to download them.