On UBUNTU 8.10 64 bits

Using apt-get to install proftpd, i've got issues, getting somes packages, even with an apt-get update :

Err http://fr.archive.ubuntu.com intrepid/main Packages
404 Not Found
W: Impossible de récupérer http://fr.archive.ubuntu.com/ubuntu/...64/Packages.gz 404 Not Found

Indeed, directory "intrepid" doesn't exist into archive.ubuntu.com/ubuntu/dists

As i've not installed anything since july, did i miss something ?


my source.list :
deb http://fr.archive.ubuntu.com/ubuntu/ intrepid main restricted
#deb-src http://fr.archive.ubuntu.com/ubuntu/ intrepid main restricted

deb http://fr.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted
#deb-src http://fr.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted

deb http://fr.archive.ubuntu.com/ubuntu/ intrepid universe
#deb-src http://fr.archive.ubuntu.com/ubuntu/ intrepid universe
deb http://fr.archive.ubuntu.com/ubuntu/ intrepid-updates universe
#deb-src http://fr.archive.ubuntu.com/ubuntu/ intrepid-updates universe

deb http://fr.archive.ubuntu.com/ubuntu/ intrepid multiverse
#deb-src http://fr.archive.ubuntu.com/ubuntu/ intrepid multiverse
deb http://fr.archive.ubuntu.com/ubuntu/ intrepid-updates multiverse
#deb-src http://fr.archive.ubuntu.com/ubuntu/ intrepid-updates multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository. This software is not part of Ubuntu, but is
## offered by Canonical and the respective vendors as a service to Ubuntu
## users.
# deb http://archive.canonical.com/ubuntu intrepid partner
# deb-src http://archive.canonical.com/ubuntu intrepid partner

deb http://security.ubuntu.com/ubuntu intrepid-security main restricted
#deb-src http://security.ubuntu.com/ubuntu intrepid-security main restricted
deb http://security.ubuntu.com/ubuntu intrepid-security universe
#deb-src http://security.ubuntu.com/ubuntu intrepid-security universe
deb http://security.ubuntu.com/ubuntu intrepid-security multiverse
#deb-src http://security.ubuntu.com/ubuntu intrepid-security multiverse