Sounds like you know what you are doing. I have no experience myself and if you have power why does it not work? Only suggestion I have is to contact your aftermarket stereo manufacture or their "Online" HELP Website. You surely are not the first to run into this issue. Should be something simple, right? Good Luck. I will see if I can find anything myself and will post it, if I do.
Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options