USB Serial Controller D connection errors and configuration on MAC OSX

After installing the USB Serial Converter is show as not connected in Network.
Is there any additional configuration required after installing?

When connected to USB Serial Controller D listed in Network this error appears-
(An error occured with the modem. Try reconnecting. If the problem continues verify your settings and contact your administrator.)

I am trying to use the USB Serial Converter to print to a Graphtec Cutting Pro FC2100-80A vinyl cutter.

Any assistance that you can provide would me much appreciated.

Thank you,
Eric D.