在过去的几天里，我无法在Debian 5.0 (lenny)上更新我们的 apt-sources 。我收到以下错误。
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/main/binary-amd64/Packages 404 Not Found [IP: 130.89.148.12 80]
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/contrib/binary-amd64/Packages 404 Not Found [IP: 130.89.148.12 80]
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/non-free/binary-amd64/Packages 404 Not Found [IP: 130.89.148.12 80]
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/main/source/Sources 404 Not Found [IP: 130.89.148.12 80]
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/contrib/source/Sources 404 Not Found [IP: 130.89.148.12 80]
W: Failed to fetch http://ftp.debian.org/debian/dists/lenny/non-free/source/Sources 404 Not Found [IP: 130.89.148.12 80]
我该如何解决这个问题？
编辑：
我目前的来源是：
# Debian Lenny
deb http://ftp.de.debian.org/debian/ …