Problems with apt-get

[Debian User <debianuser@twinsun.co.jp>]

I installed Debian from cd-rom.

I am networked.

I want to now manage packages by downloading from http sites.

I've copied /etc/apt/apt.conf and /etc/apt/sources.list from another
working Linux box.  When I run the same command in the other Linux box,
"apt-get install ssh" works fine.

However, I get an error when I run on my current box.

I get the following error:
W: Couldn't stat source package list 'http://non-us.debian.org .......

My networking settings are fine.  When I ping www.yahoo.com, I get a
response.

I've tried pinging the http sites in my sources.list and they all
respond.

Is there something else that I should be looking at?

Puzzled.