RH 9 installation error

From: Joyce (ontometa_at_yahoo.com)
Date: 01/27/04 

Date: 26 Jan 2004 16:06:32 -0800

Hi,

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.