Trouble with getting 9c to work with Realflight.
A couple of things to look at:
Have you changed to the Interface Mode in the controller calibration screen? If the InterLink is still controlling the aircraft it sounds as if it's still in the InterLink controller joystick mode.
Go to Options ---> Controller Calibration --->Controller Type and change it to Interface Mode
Alternatively, have you turned the power 'On' in the 9c?
Marko