changing F keys on Dynamis wirless DCC control system

[jackbreadman1]

I have Dynamis control system with wireless control and I also have a Broadway limited Paragon2 AC6000 with DCC with sound. I am having a difficult time changing some of the F keys on the Dynamis,  I want to make for example F4 Comprssor/Blower to the F12 key and I want to change the F12 Brake key to the F4.  I have read the book like 20 times and the only thing I can see in the book is how to latch a F key.  In the Broadway book it says change the CV#, well I did that and as far as I can tell nothing happened, the engine moved to indicate being programed but it did not change the Fkey.  Please help me if you can.  Jack