I installed an amplifier and subs with my XAV-64BT deck in my truck. When I turned it all on nothing happens. I thought maybe I had to turn something on in the sound menu but the "sub output" is darked out on the menu and doesn't even let me select it. So I installed another amp and same thing, nothing happens. The amp is new out of the box, and even though I tested and had 12v there the light on the amp doesn't turn on......it's new out of the box. I'm trying to figure out if the deck doesn't recognize the amp because something is wrong with the amp, or if the amp doesn't recognize the deck because there is something wrong with the deck. Need help please!! Thanks in advance!