That server does not have the file. Indeed, it does not seem to have a karmic
mirror at all.
Perhaps karmic was removed from it?
You need to configure your machine to use some other server.
** Changed in: update-manager (Ubuntu)
Status: New = Invalid
--
Failed to download repository
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/33161881/Dependencies.txt
** Attachment added: XsessionErrors.txt
http://launchpadlibrarian.net/33161882/XsessionErrors.txt
--
Failed to download repository information
https://bugs.launchpad.net/bugs/444866
You received
