I believe that you are going to have to go back to ever did the install
either they didn't do it correctly, or used an incorrect part, or maybe there is a missing part
I would have them activate the radio for you, it should not cost anything, if it was their mistake
If it were me, i would take the sirius subscription paperwork with me
put a grin on my face & let them know the steps that you have taken
Hopefully you can get it done quickly
I forgot that the older radios don't have the Sales Code right on the face, that must have started in '09
I am only guessing, but i believe that you have the
RAQ radio 2006-2008 Dodge Ram 1500 Factory AM/FM 6 Disc CD Radio
scroll down to
Sales Code RAQ radio - Operation on this page, about 2/3rds of the way down
http://www.wkjeeps.com/wk_radios.htm#REQ
I saw one thing that may be a problem, you
may need a module or something
AM/FM/CD (6-disc changer) radio with
optional satellite radio, hands free phone and vehicle entertainment systems (VES) capabilities. MP3 playback capable.
DODGE 1500 PICKUP 06-08 (recvr), radio, w/o Nav; w/hands free UConnect, 6 disc CD (RAQ), w/o dual zone ATC
DODGE 2500 PICKUP 06-09 (recvr), radio, w/o Nav; w/hands free UConnect, 6 disc CD (RAQ), w/o dual zone ATC
DODGE 3500 PICKUP 06-09 (recvr), radio, w/o Nav; w/hands free UConnect, 6 disc CD (RAQ), w/o dual zone ATC
Good Luck