[Elecraft] What have I dont now.

[Mike Kasrich]

I have a K-3 with sub rx installed and it was working ok up until 
today.  Now it seems there is no vfo control on the sub.  when the main 
vfo knob is moved the freq changes and acts normal.  when sub is pushed 
the sub rx is listening to the same freq as the main except the display 
reads a different freq..  Each volume control works but controls a 
different ear.

What I have I done that I cant listen to two separate freq, one in each 
ear.  They are not linked.

Help!