As I understand it, there are two different cables for programming the 280d. See pulser and inline switch on the following link. I suspect that the pulser is for 2.4gig radios that take a longer time to acquire (eg Spektrum) while the Futaba faster acquire needs only the inline switch.
You may need one or both of them depending on your radio.
Call Bob G. with your serial number and radio type and he should be able to tell you which cable
I have both cables and can bring them to SD on the 18th