You will need a new Rx for it. Also, moved this to the Correct section.
Either the beginner heli section (great for people just getting on the forum to learn, and where I put it) or in teh Tx section for the 9x. It's all good though, no worries.
Your th9x should have come with a rx. that's the one you want to use unless you changed the module. Then it would be one for that piece of equipment. In case anyone wants to know the th9x will bind to the align t-rex 100. I found a video of it on youtube.