apt-get install vim fails

Hi,

I'm trying to install vim on my ReadyNas DuoV2 (5.3.11) but getting errors. Transcript below and content of my sources.list. Any help would be much appreciated ...

Linux nas 2.6.31.8.duov2 #1 Thu Apr 18 18:24:47 HKT 2013 armv5tel GNU/Linux
root@nas:~# apt-get install vim
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libupsclient1 libpcap0.8 cracklib-runtime libnss-mdns libcrack2 libcap-ng0 libavahi-client3 libnet1
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
vim-common
Suggested packages:
ctags vim-doc vim-scripts
The following NEW packages will be installed:
vim vim-common
0 upgraded, 2 newly installed, 0 to remove and 110 not upgraded.
Need to get 970 kB of archives.
After this operation, 1,917 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Err http://ftp.us.debian.org/debian/ squeeze/main vim-common armel 2:7.2.445+hg~cb94c42c0e1a-1
404 Not Found [IP: 128.30.2.26 80]
Err http://ftp.us.debian.org/debian/ squeeze/main vim armel 2:7.2.445+hg~cb94c42c0e1a-1
404 Not Found [IP: 128.30.2.26 80]
Failed to fetch http://ftp.us.debian.org/debian/pool/main/v/vim/vim-common_7.2.445+hg~cb94c42c0e1a-1_armel.deb 404 Not Found [IP: 128.30.2.26 80]
Failed to fetch http://ftp.us.debian.org/debian/pool/main/v/vim/vim_7.2.445+hg~cb94c42c0e1a-1_armel.deb 404 Not Found [IP: 128.30.2.26 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?