apt-get package list problem

[Frank Zimmermann <F.Zimmermann@bham.ac.uk>]

Hello,

I added the line for security updates to my sources list as 
mentioned on the security web site. Now I get the following message 
whenever I run apt-get:

(voyager):/home/frank# apt-get install kde-base-crypto
Reading Package Lists... Done
Building Dependency Tree... Done
W: Couldn't stat source package list 'http://security.debian.org 
potato/updates/non-US Packages' 
(/var/state/apt/lists/security.debian.org_dists_potato_updates_non-US_binary-i386_Packages) 
- stat (2 No such file or directory)
W: You may want to run apt-get update to correct these missing files
E: Couldn't find package kde-base-crypto

Unfortunately running apt-get update does not solve the problem, I 
get the same error message. How do I get the package list for non-US?

Here is my sources.list:

deb cdrom:[Debian GNU/Linux 2.2 r3 _Potato_ - Official i386 Binary-3 
(20010427)]
/ unstable contrib main non-US/contrib non-US/main
deb cdrom:[Debian GNU/Linux 2.2 r3 _Potato_ - Official i386 Binary-2 
(20010427)]
/ unstable contrib main non-US/contrib non-US/main
deb cdrom:[Debian GNU/Linux 2.2 r3 _Potato_ - Official i386 Binary-1 
(20010427)]
/ unstable contrib main non-US/contrib non-US/main
deb http://security.debian.org potato/updates main contrib non-free 
non-US
#deb http://www.openoffice.de/debian/ potato main
deb ftp://ftp.mirror.ac.uk/sites/ftp.debian.org/debian/ potato non-free
deb ftp://ftp.wh9.tu-dresden.de/pub/linux/debian-stuff/KDE2 potato 
main crypto optional


Thanx,
	Frank