Not all servers are in servers.ini file. Open up mIRC and type..
/server -a irc.rizon.net -p 6667 -d Rizon
It should look like:
-
* Added 'Rizon' to servers list
-
After the above commands tell mIRC to connect to it by typing /server irc.rizon.net. Or look for irc.rizon.net in the drop down list and click connect.
I hope this helps.