I probably have the same one in my 05 Expedition. Are you still using the box of buttons to switch between devices? HD?
I got rid of the box of buttons, installed a flat screen HDTV, ran HDMI to the tv from the sat box, Bluray, connected the ant directly to the tv ran a sound cable to the Surround amp (TV input) now I use the tv input selector to switch between sources.
Now when you switch sources sound comes out of the surround amp no changing inputs required.
My Kharma ran over my Dogma.