Please Help With RB1 model AE

[Steve S]

Hello everyone, I hope someone knows the answer to this question. I purchase an Rb1 from Ebay. I installed it in my 2005 dodge ram 2500 and I dont get any sound. everything appears to be working however no sound. My truck does have the infinity sound system which I think I need the AG or newer model. If I got an newer mapping disc or upgrade would that fix the problem. Please Help