on BAN/UNBAN
The on BAN and on UNBAN events trigger when a user on a channel is banned or unbanned.
Format: on <level>:BAN:<#[,#]>:<commands>
Example: on 1:BAN:#mirc,#irchelp:/msg $nick Sorry but you're not allowed on $chan
It should probably be
on 1:BAN:#mirc,#irchelp:/msg $bnick Sorry but you're not allowed on $chan.