How to set up LMS so that I can play my iTunes

Hello all, total newbie here. Bought 2 touches, 4 duets for my whole house build. Wires are in and speakers going in next week. Just downloaded LMS on my Pc version 7.7.2, running windows 7 on pc. Boom and radio don't connect....actually I assume nothing does as I haven't tried the touches or the duets yet. Bought all of these because I'm a true sb lover. I used to only listen to pandora but now since I have all of these speakers, I want to access my library on my computer.....am I destined to head over to the sonos camp. I'm not too computer literate.

Thanks for reading. Any info would be greatly appreciated.

Actually It says set up complete and when i press knob becasue it tells me to it says can't connect to server. I'm sure it's pretty easy to fix right;-)