there are various things that could be happening, so need more information.

best thing to try first is to initialise the keyboard, menu/control/initial/ok/(yes)

msa ON

pick any preset style

press var 1, change the voice of an active conductor and save pan mem 1.

press var 2, change the voice, save pan mem 2.

do the same for 3 and 4.

now if you press the 4 var buttons with msa on, you will get the 4 preset registrations - if you press the 4 panel memory buttons you will get your selections of voices.