404 not found, and MD5Sum mismatches

[pacice]

have tried to apt-get update, and got the following error messages.
What do I do to fix these.

Thanks
PACICE


Hit http://gb.archive.ubuntu.com hoary-updates/main Sources
Err http://ubuntu-backports.mirrormax.net hoary-backports/main Packages
404 Not Found
Hit http://gb.archive.ubuntu.com hoary-updates/restricted Sources
Err http://ubuntu-backports.mirrormax.net hoary-backports/universe Packages
404 Not Found
Err http://ubuntu-backports.mirrormax.net hoary-backports/multiverse Packages
404 Not Found
Err http://ubuntu-backports.mirrormax.net hoary-backports/restricted Packages
404 Not Found
Hit http://ubuntu-backports.mirrormax.net hoary-extras/main Packages
Hit http://ubuntu-backports.mirrormax.net hoary-extras/universe Packages
Hit http://ubuntu-backports.mirrormax.net hoary-extras/multiverse Packages
Hit http://ubuntu-backports.mirrormax.net hoary-extras/restricted Packages
Fetched 137kB in 3s (34.6kB/s)
Failed to fetch http://security.ubuntu.com/ubuntu/dists/hoary-security/main/binary-i386/Packages.gz MD5Su m mismatch
Failed to fetch http://security.ubuntu.com/ubuntu/dists/hoary-security/main/source/Sources.gz MD5Sum mism atch
Failed to fetch http://security.ubuntu.com/ubuntu/dists/hoary-security/universe/binary-i386/Packages.gz M D5Sum mismatch
Failed to fetch http://ubuntu-backports.mirrormax.net/dists/hoary-backports/main/binary-i386/Packages.gz 404 Not Found
Failed to fetch http://ubuntu-backports.mirrormax.net/dists/hoary-backports/universe/binary-i386/Packages. gz 404 Not Found
Failed to fetch http://ubuntu-backports.mirrormax.net/dists/hoary-backports/multiverse/binary-i386/Package s.gz 404 Not Found
Failed to fetch http://ubuntu-backports.mirrormax.net/dists/hoary-backports/restricted/binary-i386/Package s.gz 404 Not Found
Reading package lists... Done
W: Couldn't stat source package list http://security.ubuntu.com hoary-security/main Packages (/var/lib/apt /lists/security.ubuntu.com_ubuntu_dists_hoary-security_main_binary-i386_Packages) - stat (2 No such file o r directory)
W: Couldn't stat source package list http://security.ubuntu.com hoary-security/universe Packages (/var/lib /apt/lists/security.ubuntu.com_ubuntu_dists_hoary-security_universe_binary-i386_Packages) - stat (2 No suc h 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.