dist-upgrade libsnmp-base debian-desktop rep problem
 

I tried this...
apt-get dist-upgrade

then the output was...
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
The following packages will be upgraded:
libsnmp-base
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 1154kB of archives.
After unpacking 86.0kB disk space will be freed.
Do you want to continue? [Y/n] y
Get:1 http://www.debian-desktop.org sarge/main libsnmp-base 5.2.1.2-4mea0 [1154kB]
Fetched 1B in 0s (1B/s)
Failed to fetch http://www.debian-desktop.org/pub/li...-4mea0_all.deb Size mismatch
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

so I installed the deb package itself with kpackage and still gives the same error, what went wrong, any ideas...
my
pIV
kernel is 2.6.8
sarge

by the way when running apt-get update says this...

Hit http://www.debian-multimedia.org sarge/main Packages
Hit http://www.debian-multimedia.org sarge/main Release
Hit http://www.debian-desktop.org sarge/main Packages
Ign http://www.debian-desktop.org sarge/main Release
Hit http://www.debian-desktop.org ./. Packages
Ign http://www.debian-desktop.org ./. Release
Hit http://www.debian-desktop.org sarge/main Packages
Ign http://www.debian-desktop.org sarge/main Release
Reading Package Lists... Done
the ones I erased were the official packages...

oh lastly my sources.list is

# Official Debian archives
deb http://security.debian.org/ stable/updates main contrib non-free
deb http://http.us.debian.org/debian/ stable main contrib non-free

deb http://www.debian-multimedia.org/ sarge main

#backports
# deb http://www.backports.org/debian/ sarge-backports main contrib non-free

#nVidia
# deb ftp://download.xs4all.nl/pub/mirror/debian/ stable main non-free contrib
# deb-src ftp://download.xs4all.nl/pub/mirror/debian/ stable main non-free cont$

deb http://nisamox.fciencias.unam.mx/debian/ stable main non-free contrib
deb-src http://nisamox.fciencias.unam.mx/debian/ stable main non-free contrib

deb http://www.debian-desktop.org/pub/li...ian/kde-3.4.3/ sarge main

deb http://www.debian-desktop.org/pub/li...n/kde-goodies/ . .

deb http://www.debian-desktop.org/pub/li...ian/xfce4.2.2/ sarge main

regards...