Live Control knobs setup ?

[tyros2009]

Just got an SX600 for 3 days. Playing Tyros3 for 12 years now, still playing.
I was able to setup knob#1 for (right hand) keyboard volume and save it thru power cycle.
Trying to set knob#2 for keyboard Reverb, get the submenus to show up, select "Reverb",  but on the Live Control screen, the "Reverb" under the knob#2 can't get selected. Did I miss something ?