After upgrading from 8.04 can longer use apt-get

[broth420]

I upgraded my Ubuntu Server 8.04 to 8.10 today (I think it went to 8.10) and now I can' run any apt commands. when I run
sudo apt-get update it hangs on each repo and then tell me:

Err http://security.ubuntu.com intrepid-security Release.gpg
Could not connect to security.ubuntu.com:80 (91.189.88.37), connection timed out

over and over again. I can't upgrade the OS to 9.04, and I can't run apt-get upgrade

I think it is my sources.list file, but not sure.
Any ideas on what could be wrong or how to fix it
Thanks, bill

[Partyboi2]

Are you using a proxy? If so check that the settings are correct in Synaptic (Synaptic>Pref>Network)

[broth420]

no proxy server, and I just built a new 9.04 server, set the nic static, and no connection any more. check resolv/conf file and it has the correct dns server listed.

[broth420]

PS just changed my address back to dhcp and it is fine. I am using server 9.04 64

[broth420]

Anyone have any idea about this, or where I can look? It has happened on three different servers with different hardware.
Thanks, Bill