SCSI ID 0? Well, i dunno what your system is, but usually ID 0 is used by the primary master HDD. Everything after 0, i.e. 1,2,3,4 etc used by others added to the chain, like second HDD, CD-ROM etc.
You should check your settings, use SCSI_Inquire in AsimCDFS to see where your CD-ROM is connected to.
You select the scsi.device on the left, and it automatically detects on which ID what is connected. So you can use that ID to enter into the settings.
Have a try :-)