Problem booting off CD

["Greg Romaniak" <greg@igillc.com>]

Hi,

I've got some DEC Personal Workstation 600AU's currently running Redhat 7.2.
Since Redhat doesn't seem to support Alpha anymore, I wanted to try a
current linux distribution that does and downloaded all 7
debian-30r3-alpha-binary cd images and burned them to discs.  Unfortunately
I can't seem to get disc 1 (or any of the others) to boot.  I get:

>>>boot dqa0 -flags 0
(boot dqa0.0.0.107.0 -flags 0)
Block 0 of dqa0.0.0.107.0 is not a valid boot block
bootstrap failure

When I pop my old Redhat 7.2 install disk in an type "boot dqa0" it starts
churning right along and boots off that cdrom.

I created the discs with EZ CD Creator 5, but also tried re-burning with
nero 6 with the same results.

Am I doing something wrong?  

Thanks,

Greg