Could not find kernel image: linux

[Tony Power <power3d@gmail.com>]

Hi!
Two days ago I've finished downloading amd64 (testing) DVD images throwght jigdo.
MD5 sums are ok. The DVDs are well burned.
The problem is when I try to boot the DVD (to install it), I get the message: 
"Could not find kernel image: linux
boot: _"

I have an Acer Aspire 1524 wlmi.
Can anybody help?
Thank you.