apt-get update出错？

wowkiller2005

apt-get update
Hit http://debian.cn99.com stable/main Packages
Hit http://debian.cn99.com stable/main Release
Hit http://debian.cn99.com stable/non-free Packages
Hit http://debian.cn99.com stable/non-free Release
Hit http://debian.cn99.com stable/contrib Packages
Hit http://debian.cn99.com stable/contrib Release
Hit http://debian.cn99.com stable/non-US/main Packages
Hit http://debian.cn99.com stable/non-US/main Release
Hit http://debian.cn99.com stable/non-US/contrib Packages
Hit http://debian.cn99.com stable/non-US/contrib Release
Hit http://debian.cn99.com stable/non-US/non-free Packages
Hit http://debian.cn99.com stable/non-US/non-free Release
Hit http://debian.cn99.com proposed-updates/main Packages
Hit http://debian.cn99.com proposed-updates/main Release
Hit http://debian.cn99.com proposed-updates/contrib Packages
Hit http://debian.cn99.com proposed-updates/contrib Release
Hit http://debian.cn99.com proposed-updates/non-free Packages
Hit http://debian.cn99.com proposed-updates/non-free Release
Err http://debian.cn99.com proposed-updates/non-US/main Packages
  404 Not Found
Ign http://debian.cn99.com proposed-updates/non-US/main Release
Err http://debian.cn99.com proposed-updates/non-US/contrib Packages
  404 Not Found
Ign http://debian.cn99.com proposed-updates/non-US/contrib Release
Err http://debian.cn99.com proposed-updates/non-US/non-free Packages
  404 Not Found
Ign http://debian.cn99.com proposed-updates/non-US/non-free Release
Hit http://debian.cn99.com woody/updates/main Packages
Hit http://debian.cn99.com woody/updates/main Release
Hit http://debian.cn99.com woody/updates/contrib Packages
Hit http://debian.cn99.com woody/updates/contrib Release
Hit http://debian.cn99.com woody/updates/non-free Packages
Hit http://debian.cn99.com woody/updates/non-free Release
Hit http://debian.cn99.com stable/main Sources
Hit http://debian.cn99.com stable/main Release
Hit http://debian.cn99.com stable/non-free Sources
Hit http://debian.cn99.com stable/non-free Release
Hit http://debian.cn99.com stable/contrib Sources
Hit http://debian.cn99.com stable/contrib Release
Hit http://debian.cn99.com stable/non-US/main Sources
Hit http://debian.cn99.com stable/non-US/main Release
Hit http://debian.cn99.com stable/non-US/contrib Sources
Hit http://debian.cn99.com stable/non-US/contrib Release
Hit http://debian.cn99.com stable/non-US/non-free Sources
Hit http://debian.cn99.com stable/non-US/non-free Release
Hit http://debian.cn99.com proposed-updates/main Sources
Hit http://debian.cn99.com proposed-updates/main Release
Hit http://debian.cn99.com proposed-updates/contrib Sources
Hit http://debian.cn99.com proposed-updates/contrib Release
Hit http://debian.cn99.com proposed-updates/non-free Sources
Hit http://debian.cn99.com proposed-updates/non-free Release
Err http://debian.cn99.com proposed-updates/non-US/main Sources
  404 Not Found
Ign http://debian.cn99.com proposed-updates/non-US/main Release
Err http://debian.cn99.com proposed-updates/non-US/contrib Sources
  404 Not Found
Ign http://debian.cn99.com proposed-updates/non-US/contrib Release
Err http://debian.cn99.com proposed-updates/non-US/non-free Sources
  404 Not Found
Ign http://debian.cn99.com proposed-updates/non-US/non-free Release
Failed to fetch http://debian.cn99.com/debian-no ... ry-i386/Packages.gz  404 Not Found
Failed to fetch http://debian.cn99.com/debian-no ... ry-i386/Packages.gz  404 Not Found
Failed to fetch http://debian.cn99.com/debian-no ... ry-i386/Packages.gz  404 Not Found
Failed to fetch http://debian.cn99.com/debian-no ... n/source/Sources.gz  404 Not Found
Failed to fetch http://debian.cn99.com/debian-no ... b/source/Sources.gz  404 Not Found
Failed to fetch http://debian.cn99.com/debian-no ... e/source/Sources.gz  404 Not Found
Reading Package Lists... Done
W: Couldn't stat source package list http://debian.cn99.com proposed-updates/non-US/main Packages (/var/lib/apt/lists/debian.cn99.com_debian-non-US_dists_proposed-updates_non-US_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://debian.cn99.com proposed-updates/non-US/contrib Packages (/var/lib/apt/lists/debian.cn99.com_debian-non-US_dists_proposed-updates_non-US_contrib_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://debian.cn99.com proposed-updates/non-US/non-free Packages (/var/lib/apt/lists/debian.cn99.com_debian-non-US_dists_proposed-updates_non-US_non-free_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://debian.cn99.com proposed-updates/non-US/main Packages (/var/lib/apt/lists/debian.cn99.com_debian-non-US_dists_proposed-updates_non-US_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://debian.cn99.com proposed-updates/non-US/contrib Packages (/var/lib/apt/lists/debian.cn99.com_debian-non-US_dists_proposed-updates_non-US_contrib_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://debian.cn99.com proposed-updates/non-US/non-free Packages (/var/lib/apt/lists/debian.cn99.com_debian-non-US_dists_proposed-updates_non-US_non-free_binary-i386_Packages) - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old ones used instead.
不知道什么回事，无法更新。
sources.list使用cn99的内容如下：
#
# Replace /etc/apt/sources.list with this file will change apt source to Debian Mirror on CN99
#
deb http://debian.cn99.com/debian stable main non-free contrib
deb http://debian.cn99.com/debian-non-US stable/non-US main contrib non-free
deb http://debian.cn99.com/debian proposed-updates main contrib non-free
deb http://debian.cn99.com/debian-non-US proposed-updates/non-US main contrib non-free
deb http://debian.cn99.com/debian-security woody/updates main contrib non-free
deb-src http://debian.cn99.com/debian stable main non-free contrib
deb-src http://debian.cn99.com/debian-non-US stable/non-US main contrib non-free
deb-src http://debian.cn99.com/debian proposed-updates main contrib non-free
deb-src http://debian.cn99.com/debian-non-US proposed-updates/non-US main contrib non-free