升级总出现问题，帮我看一下呗，谢谢了！

冲破冰河

各位前辈，帮我看看呗，升级总连不上网似的，不知道怎么回事，弄了半天也不知道到底升上没有    6 not upgraded是不是有6个没有升级呀？有什么办法吗？

  Could not connect to cuit.lcuc.org:80 (210.41.224.194), connection timed out
Err http://cuit.lcuc.org magiclinux/updates srclist
  Could not connect to cuit.lcuc.org:80 (210.41.224.194), connection timed out
Err http://apt.magiclinux.org magiclinux/updates pkglist
  Connection failed
Err http://apt.magiclinux.org magiclinux/updates release
  Connection failed
Err http://apt.magiclinux.org magiclinux/os srclist
  Connection failed
Err http://apt.magiclinux.org magiclinux/updates srclist
  Connection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/release  Connection failed
Failed to fetch http://cuit.lcuc.org/magiclinux/base/release  Could not connect to cuit.lcuc.org:80 (      210.41.224.194), connection timed out
Failed to fetch http://apt.magiclinux.org/magiclinux/base/pkglist.os  Connection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/release.os  Connection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/pkglist.updates  Connection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/release.updates  Connection failed
Failed to fetch http://cuit.lcuc.org/magiclinux/base/pkglist.os  Could not connect to cuit.lcuc.org:8      0 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/release.os  Could not connect to cuit.lcuc.org:8      0 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/pkglist.updates  Could not connect to cuit.lcuc.      org:80 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/release.updates  Could not connect to cuit.lcuc.      org:80 (210.41.224.194), connection timed out
Failed to fetch http://apt.magiclinux.org/magiclinux/base/srclist.os  Connection failed
Failed to fetch http://apt.magiclinux.org/magiclinux/base/srclist.updates  Connection failed
Failed to fetch http://cuit.lcuc.org/magiclinux/base/srclist.os  Could not connect to cuit.lcuc.org:8      0 (210.41.224.194), connection timed out
Failed to fetch http://cuit.lcuc.org/magiclinux/base/srclist.updates  Could not connect to cuit.lcuc.      org:80 (210.41.224.194), connection timed out
Reading Package Lists... Done
Building Dependency Tree... Done
W: Release files for some repositories could not be retrieved or authenticated. Such repositories are       being ignored.
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.
[zkc@MagicLinux ~]$ sudo apt-get upgrade
Password:
Reading Package Lists... Done
Building Dependency Tree... Done
The following packages have been kept back
  amarok kdeaddons kdenetwork kdenetwork-devel kdeutils tclx
0 upgraded, 0 newly installed, 0 removed and 6 not upgraded.