kitfox wrote:I have the cable that cane with the software. It connects to the radio and is a parallel plug on the other end.
Since I don't know where you got the software or cable from that isn't really very informative. However the old (very very old) parallel interfaces for FMS were extremely non-standard and AFAIK cannot be made to work with USB or any recent operating systems.
Your best bet is to buy a USB interface. They're readily available on EBay and elsewhere for peanuts (typically $10).
Alternatively the sound card input should work if you've installed SmartPropoPlus to go with it. I've had most luck using the Line In rather than Mic inputs with various Futaba/JR/Spektrum Txs.
You should also make sure you have the latest version of FMS, V2 Alpha 8.5. It works much better than earlier ones.