caelinux 2011 live DVD broken

I have recently downloaded the caelinux 2011 DVD (several times) and written various DVDs, but the live disk installation fails. The md5sum values are correct.

I get a Ubuntu login screen with the options to log in as caelinux, or guest. The caelinux account doesn't work with the passwords caelinux, or root, but the guest account with no password does work.

The DVD is displayed on the desk top, but will not mount giving the error "unknown file system iso9960".

The system will not restart or shutdown without entering the unknown caelinux password. I have to do a forced shut down to eject the DVD at the next reboot.
Does anyone know where I can download a functioning copy.

I need the DVD to repair a broken caelinux 2011 installation I don't want to scrap.
Thanks,

Carlton Matthew.