Here are some general suggestions that often help when one channel is not recognized: - Make sure you don't have any other joysticks/controllers connected, that might cause a conflict. - If connecting via USB, make sure you uninstall vJoy and Smartpropoplus if you have them. Their driver messes with things when connecting via USB. - Make sure you have "Heli" selected as model type on your radio. ("Plane" generally doesn't work very well). - If you are using a USB dongle - check if there's a switch on the dongle where you can select different modes. - Perhaps you can remap the output channels (in the menu of the transmitter) so that it sends to another channel.