"Disk Is Empty"
I got the above message when trying to load any DVD into DVD Decrypter.
The Noble Author of DVD Decrypter pointed out that this is common behavior when older versions of Blindwrite's buggy Patin-Couffin drivers are still in the system.
Could this relate to your problem?
If so, in Win98 look in Windows\System\IOSUBSYS for
PCOUFFIN.VXD
PcAtip.vxd
Or try installing the newest Blindwrite5. Then remove it.
See "Disk Is Empty" topic under
http://forum.dvddecrypter.com/index.php?showforum=6
Regards,
-ter