A question about changing servers

Im a new player in the server and i would like to play w some friends on the server Icecrown, but when i downloaded the client i noticed that the server was Frostmourne. I have been looking for the link to change the log, but i always find the same one that links me to Frostmourne. What should I do?

Thnxs

once at charcter list (the menu where you create chaarcter or log an already created character) there is a "Change Realm" button on the top .

Btw you could have asked to your friends....