The first thing to check is that you installed the Serial-to-USB driver that comes on the small CD along with the USB-to-Serial conversion cable. Nothing will work without first installing the appropriate drivers. Windows should prompt you for this CD when you first connect the converter cable.
Next, make sure you have selected the correct COM port for your serial device. Under VisiWave, select the Option menu item under the File menu. Select the correct COM port next to "Nav Unit Serial Port".
To find out which COM port is the correct one, go to Windows' Control Panel. Double click on System. Click on the Hardware tab. Then click on the Device Manager button. Scroll down until you see "Ports (COM & LPT)". Click the plus next to this item. You should see an entry that starts "Prolific USB-to-Serial Bridge" followed by a COM port. That is the correct port number. If you don't see this entry, then the driver was probably not installed.
The navigation unit should now be usable by VisiWave. If you continue to have problems, as always, just send an email to
support and we would be more than happy to help you.
