So my dji phantom won't take off because the roll stick isn't in the center. I've plugged this into my pc to reconfigure update firmware and defaults and parameters, basically everything I could do, even change gain settings. But simply when I move along the A (roll) axis on the tx nothing shows up on the naza utility. The A axis constantly fluctuates without touching the tx. I just got the drone and I think I have a broken tx. Any thoughts?