I've just been setting up modes pulse widths for APM on my radio TX (JR DSX9).

The six pulses are almost exactly as specified in the instructions.

Everything works fine on the laptop, and the modes change correctly, and the numbers are correct, on the setup screen as I move the two switches to get the pulses.

When the APM is connected however, it doesn't change from mode 6 to mode 5 (out of manual and into the next mode) when I move the switches.

All the other modes change perfectly,

However the APM will change correctly from mode 4 into mode 5!

It works in one direction but not in the other.

Any ideas as to what I can be doing wrong?

Thanks in advance for any help on this.