[Comm] не могу обновить 3.0.4

[Sergey Kulakov]

Добрый день.
Установил 3.0.4
при попытке получить список пакетов:

apt-get update

Ign cdrom://ALT Linux 3.0.4 Installer (caprifoil) ALTLinux release
...
Failed to fetch
ftp://updates.altlinux.ru/3.0/i586/base/release
file was not signed with a known key. Check if the proper gpg key was
imported to your keyring.
Reading Package Lists... Done
Building Dependency Tree... Done
W: Release files for some repositories could not be retrieved or
authenticated. Such repositories are being ignored.
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old
ones used instead.

Подскажите ПЛЗ в чем проблема?