[syslinux] isolinux 2.0+ won't boot from DVD

[Taylor, ForrestX]

I am trying to rebuild Red Hat Linux 9 on DVD.  I am using the provided 
isolinux 2.00 (I tried the latest 2.04, with the same results), and I 
get an error trying to boot from the DVD.  I burned the boot.iso 
(basically a triple-wide boot disk using the same isolinux directory) to 
DVD, and it booted fine.  The error I get when booting the DVD using 
isolinux-debug.bin is this (copied by hand):

ISOLINUX 2.00 2002-10-25  Copyright (C) 1994-2002 H. Peter Anvin
isolinux: Staring up, DL = 9F
isolinux: Loaded spec packet 0K, drive = 9F
isolinux: Loading main image from LBA = 00EA77C
isolinux: Sectors to load = 004
isolinux: Loaded boot image, verifying
isolinux: Main image read, jumping to main code...
isolinux: Root directory at LBA = 0000001D

and there it hangs.

 From the archives, it appears that it should find the isolinux 
directory next, but it is not.  This same method worked with Red Hat 
Linux 8.0, although it used syslinux-1.75.

The command I used to create the iso image is:

mkisofs -b isolinux/isolinux.bin -c isolinux/boot.cat -J -p \
"myemail" -P "Red Hat" -V "Redhat 9/8/7" \
-r -T -v -A "Red Hat Linux/i386 9" -o redhat9-8-7-dvd.iso \
-no-emul-boot -boot-load-size 4 -boot-info-table -l i386/

Any clues?

Thanks,

Forrest
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