Mises à jour échouent !

bon soir tout le monde

aidez moi svp;
voilà je suis sous ubuntu 12.10 , ces derniers jours le gestionnaire de mises à jour, m'envoie un message.

Le téléchargement des informations du dépôt a échoué

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W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/Release.gpg Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/Release.gpg Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/Release.gpg Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/Release.gpg Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/Release.gpg Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/multiverse/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/multiverse/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/restricted/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/restricted/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/universe/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/universe/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/main/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/main/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/multiverse/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/multiverse/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/restricted/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/restricted/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/universe/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/universe/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/main/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/main/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/multiverse/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/multiverse/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/restricted/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/restricted/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/universe/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/universe/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/main/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/main/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/restricted/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/restricted/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/universe/i18n/Translation-en Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/universe/i18n/Translation-fr Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/main/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/main/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/restricted/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/universe/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/multiverse/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/main/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/restricted/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/universe/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal/multiverse/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/restricted/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/universe/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/multiverse/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/main/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/restricted/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/universe/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/multiverse/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/main/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/restricted/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/universe/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/multiverse/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/main/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/restricted/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/universe/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-updates/multiverse/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/main/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/restricted/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/universe/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/source/Sources Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/main/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/restricted/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/universe/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, W:Failed to fetch http://dz.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/binary-i386/Packages Unable to connect to 46.105.125.47:3128:
, E:Some index files failed to download. They have been ignored, or old ones used instead.