What size of image file are you trying to produce? Which version of Windows are you using? Which file system - FAT32 or NTFS? So many questions!
You may have trouble producing a file over 2 Gig under the FAT file system, I think that is the limit, but NTFS shouldn't have that problem.
Have you tried producing the files destined for CD from DOS, but to another hard disk, or partition, and then copying them to CD or DVD when you are back in Windows?
Have you tried the Hitachi web site for the software that should have come with your Deskstar? It might be available as a download, possibly FREE!