[SOLVED] During Update get "Failed to fetch"

I am running Ubuntu 12.04.2 LTS. When I tried to perform a routine update, I got:

Failed to fetch http://us.archive.ubuntu.com/ubuntu/...10.11_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...10.11_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...10.11_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...10.11_i386.deb 404 Not Found [IP: 91.189.91.15 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/...10.11_i386.deb 404 Not Found [IP: 91.189.91.15 80]

I tried several times and always got the same message. Can anybody tell me what to do????