I'm trying to connect the line out from my Delphi Skyfi2 to the "AUX" input on my 9887, but for some reason, I'm not getting anything through the head unit. I'm using the Ai-net connectoer that plugs into the back of the 9887, and a mini jack to RCA adapter that connects between the Delphi and the Ai-net connector. And I've made sure the aux function on the HU is turned on. Any ideas?