I am trying to install RH 9 with booting diskette.
I downloaded 3 iso files in redhat.com and burned them in three CDs.
I started with booting diskette and it was working.
After I selected Local CDROM for installation method,
the screen shows the following errors.

The Red Hat Linux CD was not found in any of your CDROM drives.
Please insert the Red Hat Linux CD and press OK to retry.

The fist iso CD was in CDROM drive.
I already checked MD5 checksums.
All three CD were correctly burned.

I thnik the booting program at least found my CDROM.
But why it does not recognize my CD?

Thank you in advance.