JA-DAC innovations Transmitter to PC Interface- can't get it

[trroadster]

I have a JA-DAC interface box which connects to the "Buddy" port on a Hitec Focus 4 transmitter, converts the signal and then connects via a 15 pin cable to the sound card of the pc. The interface has a set of 8 dipswitches currently configured with 5, 7 and 8 "on".

How do I configure this device to work with FMS?

Any help much appreciated!!
TIA