You're looking for the one that has a gold star on a brownish background with a small number 2 on it. It will have the name Call of Duty 2 Multiplayer underneath it. The Green logo with the number 4 is for 4 and the grey looking one is WaW.
When you load up the game, make sure you set your name to BlackRose>XI< in the multiplayer options. To get to our server, hit multiplayer, refresh it and look for any of the servers beginning with >XI<, those will be ours. Make sure to add them as favourites as well.
When it comes to connecting, it will take some time as you will be downloading all the maps and the mod that Loader and I have been putting on there for people to play. If you don't connect after 20 seconds, hit escape and try again. You can also open the console with ` or ~ (if you have it enabled), type disconnect and hit enter to disconnect from the server then open it again, typing reconnect; doing the same as before, hitting enter.
If you need help, contact any of the admins as they'll be around to give you a hand!