OEM Sirius Install, need help!

I have a 2001 330ci that I have replaced the head unit with a OEM unit from a 2004. First I installed the aux input and then my OEM CD changer to the head, which all worked great.

This past week I added the OEM Sirius unit. But ever since I added the Sirius, which works great, the CD changer (not the indash CD) has a very "tinnish" sound, like something is not grounded or connected properly. I have removed it and re-installed it several times, and tried 3 new connector cables (the cable that runs from the Sirius tuner to the CD changer) in hopes that I just had a bad cable.

Sidenote: to install the Sirius you use the factory cables that you would normally plug into the CD changers. IF I unplug the Sirius, and plug those cables directly into the CD player as I had it before the Sirius install, the CD changer works great. But if I hook up as per the instructions, run the factory cable to the Sirius and then the jumper between the Sirius and the CD changer, it sounds terrible.

I would appricate any help or suggestions that anyone here might have.

Thanks in advance.
Joe

1. The head unit saves separate tone settings (bass, treble, etc.) for each input. Could be as simple as changing the CD settings to your taste.

2. Defective Sirius receiver