G3 and Futaba 9C
 

I hope someone can help.
I cannot make my G3 recognize my 9C transmitter.
I have made sure that I was in PPM mode.
The connecting cable was plugged in securely in the back of both transmitters.
Launched the program with my transmitter on.
Still nothing?:(
Can someone tell me what I am doing wrong.
I have left a message with the help line at G3 but it's been a week and they haven't called back.
Thanks!
JLK