Code:
 

  if $did == 6 { /memoserv list | put something here to show up in the list }

you need to wait for memoserv to reply then read the reply to the listbox something like
Code:
 
on ^*:notice:*:*:{
  if ( $nick == MemoServ ) {
    if ( *memoserv*reply*to*list*command* iswm $1- ) {
      did -r memomailer 2
      did -a memomailer 2 $1-
    }
  }
}

Hope that helps

billythekid