Sarge is dead. It no longer gets security updates. If your machine
is network accessible, you need to upgrade.
/etc/apt/sources.list:
deb http://debian.mirror.rafal.ca/debian/ etch main contrib non-free
deb-src http://debian.mirror.rafal.ca/debian/ etch main contrib non-free
deb http://security.debian.org/ etch/updates main contrib non-free
deb-src http://security.debian.org/ etch/updates main contrib non-free
deb http://www.debian-multimedia.org etch main
As root:
apt-get update && apt-get install aptitude && aptitude update &&
aptitude dist-upgrade
Now you're running etch. Bite the bullet! This really does work, and
you really shouldn't be running software that's not getting security
updates.