source.list and some 404 errors :/

[Emmanuel Doguet <ml@doguet.com>]

	Hi,

I have this on my source.list :

deb http://ftp.de.debian.org/debian-amd64/debian/ testing main

And since some day ... I can't retreive wget ou other (eGroup), I have a 
404 Errors :/

I have do an apt-get update, of course.

What is wrong ?