Hi:
Please fix you preseed file first according to the documentation:
see the appendix about preconfiguration in the installation guide.
Thanks for the corrections!
Please specify _exactly_ which variant and version of the installer you
are using and for which architecture. The full URL of the image you are
using is the easiest way to do that.
"testing" can be any of ~150 images we have...
OK, The exact URL of the installer image is:
http://ftp.de.debian.org/debian/dists/lenny/main/installer-i386/current/images/netboot/
Thanks and sorry for the inconveniences:
Jon Ander Ortiz