I've got a Pioneer DEH-P350 head unit (XM Ready), and I FINALLY got the antenna, tuner, and the adaptor thing specifically for Pioneer HU's.

I've got everything connected, antenna on the roof, and it doesn't work. I'm lookin at all the manuals I have for everything, and I'm stumped. my head unit apparently isn't getting the signal that it does indeed have an XM input, so what gives?

thanks in advance guys!