Apt problem

[Grahame White <grahame@regress.homelinux.org>]

When I try to do an apt-get update it goes off and downloads the package 
lists and then comes up with the following:

W: Couldn't stat source package list http://amd64.debian.net sid/main 
Packages 
(/var/lib/apt/lists/amd64.debian.net_debian_dists_sid_main_binary-amd64_Packages) 
- stat (2 No such file or directory)
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.


Trying to do an update again produces the same error.

anyone else seeing this, or know how to resolve the problem?

Grahame