Failed to install on ASUS 51Vr

Need help.

During the installation from DVD-RW on my notebook SUSE 11.1 has stopped and asked to put into DVD-ROM ‘openSUSE 11.1.0 (Disk 1)’. The following information was attached: “failed to mount cd:///?devices=/dev/sr0 in /mnt/var/tmp/AP_0x00000001: No medium found (mount: No medium found on /dev/sr0)”.
My notebook is ASUS M51Vr.

Is there any explanation of such error?
How to cope the problem?

Yours faithfully:)

Run the media check from the dvd
Sounds like a dud media burn

Checked.
Media burn - Ok!

Tell us how far you get in the install. Is this happening as the installer is installing or during setup?