...except for the second resistor. Do you know which side connects to which pin?
Do you refer to the additional resistor? If you do, there in no meaning to a side here. Anyway you add the resistor should work the same.
And should I be able to get a current to pass through the transistor?
I believe that you should. It may be pretty small though.
Also, please take a look at the troubleshooting section in the following link, it may not be the cable itself but some others settings on you computer (not only FMS settings):
http://www.tmac.asn.au/fms_free_flight_simulator.htm
Hope that helps,
OG.