Please check first if the writer works under other operating systems. Concretely:
If "it doesn't work" even under other operating systems you have a hardware conflict or defective hardware.
Try to use Linux. Installation and configuration of SCSI-drivers for DOS is the hell. Linux is too complicated? Ha!
Most likely those errors are caused by
Under various circumstances SCSI devices dis- and reconnect themselves (electronically) from the SCSI bus. If this feature is not available (check controller and kernel parameters) some writers run into trouble during burning or fixating the CD-R.
Especially the NCR 53c7,8xx SCSI driver has the feature disabled by default, so you might want to check it first:
NCR53c7,8xx SCSI support [N/y/m/?] y always negotiate synchronous transfers [N/y/?] (NEW) n allow FAST-SCSI [10MHz] [N/y/?] (NEW) y allow DISCONNECT [N/y/?] (NEW) y