[Elecraft] K3 Main Radio plays in Left External Speaker Only

[Bud Governale, W3LL]

How can I get the main receiver to play from both L & R external computer speakers?
The main receiver plays in only the left external computer speakers.

Using firmware 3.11.
K3 audio output is connected to the soundcard input. Soundcard output feeds both the computer and auxiliary speaker 
pairs.
Computer plays stereo channels properly in both L & R external speakers.
When Sub receiver is turned on it's audio plays in the right speakers and the main receiver plays in the left speakers.
Headphones which are plugged in rear panel play properly with main in both ears
and when sub is turned on it plays in the right ear with the main receiver heard in the left ear.
Setting Config: SPKRS to 1 or 2 makes no difference.
What have I set up wrong?

Bud W3LL
w3ll at arrl.net