Hi, Trying to use the Automatic Motor Tuning Feature, for my new Realtrack 156,  on a PowerCab by setting CV54 to 0 then pressing F1 but can't seem to get it to work.   I go onto "Programming On The Main" select the loco number and then select CV.  I then enter 54 for the CV and set it to 0.  I then press Escape and the number 1, I assume that's F1,  on the controller but nothing happens.  I'm guessing I'm doing something wrong in the process but getting fed of up trying so I'd thought