Need help on Pen Server Weight

Here is my startup script but still Pen seems not to use server weight

#!/bin/sh

#

# startup script for pen

# pchaganti_at_gmail.com

LOGFILE=/var/log/pen.log

#-------------------------

# SMTP Load Balancer

#-------------------------

PIDFILE25=/var/run/pen25.pid

CONTROLPORT25=8889

LBSERVER25=10.9.68.10:25

SERVER25_1=10.9.68.132

SERVER25_2=10.9.68.133

SERVER25_3=10.9.68.134

case "$1" in

    start)

        if [ -x /bin/pen ] ; then

        echo -n "Starting pen on Port 25 SMTP: "

        /bin/pen -C $CONTROLPORT25 -X -l $LOGFILE -p $PIDFILE25 $LBSERVER25
-W $SERVER25_1 $SERVER25_2 $SERVER25_3

        echo "OK"

    fi