[Elecraft] split question

[Julie Royster]

Wise Group people, I must have something set wrong because when trying to
work split with the K3 sub receiver, I get the DX station in the left ear
but do NOT hear the pileup in the right ear (no audio in right ear).  I have
read the manual and the extra book but cannot figure out what is wrong.  Any
clues?
Does this depend on a menu setting I have not discovered?
THANKS!
Julie KT4JR, newbie to K3