Put the following code(s) in your "remotes" (or type ALT+R)
on 1:join:[color:red]#Channel[/color]: { mode $chan +v $nick }
or if the channel is registered with ChanServ you could do this
on 1:join:[color:red]#Channel[/color]: { msg ChanServ Voice $chan $nick }
But ChanServ also has a feature (depending if your network supports it or not) called the VOP command. To add someone to this list, type:
/msg ChanServ vop Channelname add Nickname For additional help with this command, type:
/ChanServ help VOP (usually thats what it is) or go to your designated Network help channel.
***NOTE: The text in red indicate where you put YOUR channel's name Hope this helps