First of all, I should say that #RockBand is an IRC chatroom where people can chat live! Users should know that the rules of the forums apply in the IRC chat. Here's what you should do:

First, connect to the server irc.windfyre,net if you are using and IRC chat client, or join by going to http://windfyre.net.

Then type, /join #RockBand. Members of the forum will be voiced, but don't prevoke me to take it away from you.

Also, if you don't have a chatting client, you can download one called mIRC. You can download it here.