Software :: Configure Irssi To Work Correctly After Having Used XChat For Quite Some Time?

I am trying to configure irssi to work correctly after having used XChat for quite some time. When I try to join #fedora on Freenode, however, I am unable to identify my username (which worked fine in XChat). Subsequently, I automatically join #fedora-unregistered (see http://pastebin.com/XUcx7CLe). I have edited the contents of the ~/.irssi/config file using /COMMAND in the irssi client (see http://pastebin.com/zV7NZYKG). I think these are the most relevant parts of the configuration file where the problem must lie.

Code:
{
address = "irc.freenode.net";
chatnet = "Freenode";
port = "6667";
use_ssl = "no";
ssl_verify = "no";
autoconnect = "yes";

[Code]...