Hi: I used the 11mv, dx9 simultaneous 1 channel and 4 channel linkage problem, 1 channel and 4 channel corresponds to rc x and rc 4, tail servo corresponding rc 5, rc 6 no response.
dont't care for the input channel names. That's not important where they come in. I guess you should move your collective pitch function in your transmitter to an channel which is submitted to the computer by your dongle.
Then start neXt, press esc, change to Settings > Input Device tab and press there onto calibrate input device. Press there onto calibrate input device and follow the instructions.
If you cannot get this working, you should purchase an compatible USB adapter or better an RX2SIM.