8.04: Fails to update some software

[Rajiv Vyas]

I get the following error when I am trying to update some software.
Any idea why this is happening and how I can fix this:

W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.24-19-generic_2.6.24-19.33_i386.deb
  404 Not Found [IP: 91.189.88.45 80]


W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux-ubuntu-modules-2.6.24/linux-ubuntu-modules-2.6.24-19-generic_2.6.24-19.27_i386.deb
  404 Not Found [IP: 91.189.88.45 80]


W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/e/evolution/evolution_2.22.2-0ubuntu1.3_i386.deb
  404 Not Found [IP: 91.189.88.45 80]


W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/e/evolution/evolution-common_2.22.2-0ubuntu1.3_all.deb
  404 Not Found [IP: 91.189.88.45 80]


W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/e/evolution/evolution-plugins_2.22.2-0ubuntu1.3_i386.deb
  404 Not Found [IP: 91.189.88.45 80]


W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-headers-2.6.24-19_2.6.24-19.33_all.deb
  404 Not Found [IP: 91.189.88.45 80]


W: Failed to fetch
http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-headers-2.6.24-19-generic_2.6.24-19.33_i386.deb
  404 Not Found [IP: 91.189.88.45 80]