update to security debian

[gustavo <gustavoh@techunix.technion.ac.il>]

I added the next line in my sources.list file
deb http://security.debian.org/ stable/updates main

but aI receive in loop the next 3 lines:
>81% [Connecting to www.fs.tum.de (129.187.202.22)]
>Err http://www.fs.tum.de woody/bunk-1/main Packages
>  Could not connect to www.fs.tum.de:80 (129.187.202.22), connection 
timed out

for ever, ever , and ever. When I run:
>apt-get  update

What can be the problem???

gustavo