Take it to your dealer.
I have a 2004 Goldwing and the CD Changer was installed at time of purchase. My changer began throwing error messages this past August the first time I loaded multiple CD's into it. I attempted to get the 6 CD's out and one would not eject. I called my dealer and as soon as I mentioned Honda CD Changer problem with a stuck CD and error messages, they said bring it in and we'll send it out.
About a month later I got it back and they said Honda took care of the repair and shipment costs. Invoice stated repair cost $148. I didn't get the stuck CD back, but I'm happy the repairs were paid for.