CCR 600 with Blaupunkt CD not working?

I have Vectra with a CCR 600 running a Blaupunkt Changer, I have both codes, the CD is running through the mag but is not being recognised by the radio. therefor I can not code in the CD, it is not displaying CD Safe when I press the CD button and turn the set on to code it the display just goes blank. Has anyone any Ideas?