Problem "Detect 0 radio channels. To operate PX4, you need at least 5 channels"

I was using Futaba T14SG Remote controller an R7008SB receiver. When I use the QGC to flash the PX4 1.10.1 Stable Release. Everything is OK. However, when I upload my customized firmware, which I only make change on Firmware/ROMFS/px4fmu_common/mixers/blade130.main.mix, The firmware cannot detect the RC signals. I got the same reminder when I tried to calibrate my radio. I just want to know how to solve this problem.

It’s hard to guess the problem, unless you share the changes you made. It sounds like something is wrong with them.