You can try by creatin an ISO image of the Installer Disk and check
".cdr" can have a couple of properties, only one of which we can currently read (DVD/CD master, no encryption) - if you picked anything else while creating it (e.g. compression or encryption), it won't work.
thanks for your help - it turned out that my problem was with the media - it wasnt bootable afterall. installed an iso instead.
karen
fixed.