I ended up calling Sweetwater.   The tech guy went through a list of things and said something in my audio had been disconnected.   I have no idea exactly what or how.    Anyway, it took a while to get it reconfigured, but it's running now.
 
Thank you guys very much for all your help!!
 
Greg
 

Anderton
Here's an article on how to do this.

 
Thanks for the article!  I will read it.
Greg