[bitfolk] Trying to install apt-show-versions

Hi, I'm trying to install "apt-show-versions" to allow me to upgrade some packages on my server. sudo apt-get install apt-show-versions generates the following response:- --------------------------- matthew@mail:~$ sudo apt-get install apt-show-versions Reading package lists... Done Building dependency tree... Done The following NEW packages will be installed apt-show-versions 0 upgraded, 1 newly installed, 0 to remove and 35 not upgraded. 1 not fully installed or removed. Need to get 18.9kB of archives. After unpacking 123kB of additional disk space will be used. WARNING: The following packages cannot be authenticated! apt-show-versions Install these packages without verification [y/N]? y Errhttp://apt-cacher.lon.bitfolk.com dapper/universe apt-show-versions 0.09ubuntu1 404 Not Found Failed to fetch http://apt-cacher.lon.bitfolk.com/ubuntu/gb.archive.ubuntu.com/ubuntu/pool/… 404 Not Found E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? matthew@mail:~$ --------------------------- Can anyone suggest a fix - or am I doing something wrong? I also ran apt-get update and sudo apt-get install apt-show-versions --fix-missing, but this didn't help! Many thanks Matthew