[bitfolk] Upgrading from Etch to Lenny

I'm attempting to upgrade my VPS from Etch to Lenny and then onto Squeeze. For some reason it is failing at the first step. What is happening is shown below. What is the solution? Thanks Neil myserver:~# aptitude update Ign http://apt-cacher.lon.bitfolk.com lenny Release.gpg Ign http://apt-cacher.lon.bitfolk.com lenny/updates Release.gpg Ign http://apt-cacher.lon.bitfolk.com lenny Release Ign http://apt-cacher.lon.bitfolk.com lenny/updates Release Err http://apt-cacher.lon.bitfolk.com lenny/main Packages 404 Not Found [IP: 85.119.80.211 80] Err http://apt-cacher.lon.bitfolk.com lenny/contrib Packages 404 Not Found [IP: 85.119.80.211 80] Err http://apt-cacher.lon.bitfolk.com lenny/main Sources 404 Not Found [IP: 85.119.80.211 80] Err http://apt-cacher.lon.bitfolk.com lenny/contrib Sources 404 Not Found [IP: 85.119.80.211 80] Err http://apt-cacher.lon.bitfolk.com lenny/updates/main Packages 404 Not Found [IP: 85.119.80.211 80] Err http://apt-cacher.lon.bitfolk.com lenny/updates/contrib Packages 404 Not Found [IP: 85.119.80.211 80] Reading package lists... Done W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/main Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_ftp.uk.debian.org_debian_dists_lenny_main_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/contrib Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_ftp.uk.debian.org_debian_dists_lenny_contrib_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/updates/main Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_security.debian.org_dists_lenny_updates_main_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/updates/contrib Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_security.debian.org_dists_lenny_updates_contrib_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/main Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_ftp.uk.debian.org_debian_dists_lenny_main_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/contrib Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_ftp.uk.debian.org_debian_dists_lenny_contrib_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/updates/main Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_security.debian.org_dists_lenny_updates_main_binary-i386_Packages) - stat (2 No such file or directory) W: Couldn't stat source package list http://apt-cacher.lon.bitfolk.com lenny/updates/contrib Packages (/var/lib/apt/lists/apt-cacher.lon.bitfolk.com_debian_security.debian.org_dists_lenny_updates_contrib_binary-i386_Packages) - stat (2 No such file or directory) W: You may want to run apt-get update to correct these problems myserver:~#