Hi,
First you need the cd0: moved from storage into devs, then you need to check to see if the scsi terminating resistors are removed from you scsi card since your scsi is an external device. The last thing you need is to make sure your scsi cdrom player is set for device number 6 the last device in the string, you also have to set cd0: for device 6 in the icon or mount list. Make sure your cd0: is also set for scsi. Do not use device number 7 as this pertains to the scsi card itself.
This is the best that I can remember. Would actually have to break out my Amiga to confirm. Oh yes, don't forget to set the terminating resistor on your cdrom.
smerf