atualização do ubuntu 7.4 para o ubuntu 7.10

dcambui
(usa Debian)

Enviado em 06/12/2007 - 17:15h

qdo tento atualiazar meu ubuntu de 7.4 para o 7.10 aparece a mensagem:

Failed to fetch http://medibuntu.sos-sts.com/repo/dists/feisty/free/binary-i386/Packages.gz 404 Not Found
Failed to fetch http://medibuntu.sos-sts.com/repo/dists/feisty/non-free/binary-i386/Packages.gz 404 Not Found
Failed to fetch http://medibuntu.sos-sts.com/repo/dists/feisty/free/source/Sources.gz 404 Not Found
Failed to fetch http://medibuntu.sos-sts.com/repo/dists/feisty/non-free/source/Sources.gz 404 Not Found
Failed to fetch http://archive.ubuntu.com/ubuntu/dists/feisty-updates/multiverse/binary-i386/Packages.gz Sub-processo gzip retornou um código de erro (1)

o que será?