I just got my D3 installed and i'm having trouble with the XM audio. I can select XM as the audio source, but I don't get any sound at all. I have not yet activated my XM subscription, but I can flip through the 3 or 4 stations that are available without activating (like the XM preview channel). Shouldn't the audio on these few channels work without activating? All the other audio works fine (normal radio, nav voice, misc button sounds). Anyone else have this experience? Help me!!!!