K3 Help Macro Mic Input

[i5nph]

I am using firmware 05.57 and I am tryng to use the command MP to write macro to switch Microphone from LINEIN and FPH.

But I get response MP?

This macro I know was working before.....it is very important because I work JT65 and I would like to switch the way of the audio input (LINEIN and FPH) without be forced to go to Menu.

Hope in some help

Thanks in advance

73