zed, make sure you use the right port :D irc.nixers.net/6667 (it's / on xchat right?) and then autojoin the channel #nixers.
Note: if you are using your nixers bouncer the address you connect to is nixers.net:1025

zygotb, the unixhub irc/forum is no more,s o you can't connect to it.
Under ZNC Behavior in your settings (on the bouncer) you find is Max IRC Networks Number:,
which is automatically set to 1, did you change it to whatever the amount is you need?

If there are any questions feel free to ask :D

Edit: Make sure you get your bouncer by asking yrmt on the irc (or sending him a PM?)
Test-Run/ttrn