seems like ur missing a few closing brackets.
also you could clean it up some

menu channel,menubar {
  BotServ
  .Turn BotServ $iif($group(#Botserv) = on,Off,On):{
    $+(.,$iif($group(#Botserv) = on,dis,en),able) #Botserv
    echo -a BotServ control is $group(#Botserv)
    away $iif($group(#Botserv) = on,is using BotServ to talk! Beware)
  }
}
#Botserv off
on *:INPUT:#:{
  if ($me isop #) {
    .bs $iif($1 == /me,act # $2-,say # $1-)
    haltdef
  }
  else { 
    echo -a ERROR: You need ops to do that. 
    haltdef
  }
}
#Botserv end

TMFKSOFT Said:

Its uses "bs say" instead of "msg botserv say"
because "msg botserv say" can sometimes come up in the chat
and disrupt what you are seeing.

if thats the case you can change the....

.bs

to...

.msg botserv