Unmet dependencies

[Antonio Rodriguez <arodriguez@worldnet.att.net>]

After running apt-get update; apt-get -f dist-upgrade and downloading
tons, I got the following umet dependencies: (Says file 404 not found)
info 4.0-1
debian-policy 3.1.1.0
dnsutils 1:8.2.2p5-1
rcs 5.7-12
catdoc 0.91.2-2
libwww-perl 5.4-1
scwm 0.99.5.1-1
xdaliclock 2.14-3
xscreensaver-gl 3.21-2
 and a buch more.
So, it does not want to install anything, complains about the
dependencies. I've tried --fix-missing, and -f dist-upgrade. Same
result. What do you recommend? May be I need to add some other link that
I have missing in my sources.list? But then, it happened after running
update!!!
Thanks, Antonio.