Call of Duty 5 Coop Problems

I'm not surprised, Call of Duty 5 does not exist.

Dude you know What i mean, as in World at war.

Actually, I didn't. My original thoughts were on either Black Ops or Modern Warfare 2. Aside from that, I have no experience with World at war so cannot help.

well, can you ask someone that can?

look in your instruction manual and make sure the ports listed there are open in the firewall. if there not set for both udp and tcp then set them. it could also be that there are no servers within your ping limit so they dont show up. also make sure you are on the rite server tab with the correct options enabled and disabled.
lastly check pbbans to see if you have a guid that has been banned. you can get your guid of sites like game tracker. by enetring your gamer tags in the user search. if you have managed to connect to any server in the past and played at least 20 mins you should be able to find yourself.

I brought it off steam though?