Red Hat 5.2 no longer installable from DRAC?

[Herta Van den Eynde]

I'm trying to install Red Hat EL 5.2 on a Dell PE 1850 via the DRAC 4
card, with rhel-5.2-server-i386-disc1.iso mounted as virtual media.  At
the boot prompt, I hit <Enter>, which should start the graphical
installation, but it starts off with a text installation.  I am asked
- whether I want to test the media, which I skip
- what language I want to use - I select "English"
- what keyboard I have - I select "us"
- the installation method - "What type of media contains the packages
to be installed?"
 I have the choice between
 - Local CDROM
 - Hard drive
 - NFS image
 - FTP
 - HTTP
 but not virtual CDROM.

How can I get it to install from the virtual CDROM?

Choosing "Local CDROM" doesn't work.  It returns:
 The Read Hat Enterprise Linux Server
 CD was not found in any of your
 CDROM drives.  Please insert the Red
 Hat Enterprise Linux Server CD and
 press OK to retry.

It got that far using the virtual media, so why can it not simply
continue using it?
(FWIIW, this works in RHEL 5.1.)

Kind regards,

Herta

-- 
"Life on Earth may be expensive,
 but it comes with a free ride around the Sun."