webiopiの質問です #Python

webiopiを使って、ブラウザに複数のボタンを表示させ、ラズベリーパイの複数のGPIOをon,offしたいのですが、うまくいきません。
具体的にはGPIO12,13をそれぞれブラウザのボタンでON,OFFしたいのですが。
下記のようにプログラムを作成すると、ブラウザが「このサイトにアクセスできません」と表示されます。script.pyの7行目「LIGHT2 = 13」と14行目「GPIO.setFunction(LIGHT2, GPIO.OUT)」と最終行「GPIO.digitalWrite(LIGHT2, GPIO.LOW)」を消すと、ブラウザはアクセスできて、GPIO12だけ操作できます。
GPIO13も操作できるようにするにはどうしたらいいでしょうか？
宜しくお願い致します。

index.html


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>WebIOPi | Light Control</title>
    <script type="text/javascript" src="/webiopi.js"></script>
    <script type="text/javascript">
    webiopi().ready(function() {
        var content,button;
        content=$("#content");

        // Create a "Light" labeled button for GPIO 12
        button = webiopi().createGPIOButton(12, "ranp1");

        // Append button to HTML element with ID="controls" using jQuery
        $("#controls").append(button);
        button = webiopi().createGPIOButton(13, "Light2");
        $("#controls").append(button);

        // Refresh GPIO buttons
        // pass true to refresh repeatedly of false to refresh once
                webiopi().refreshGPIO(true);
    });

    </script>

<style type="text/css">
        button {
            display: block;
            margin: 5px 5px 5px 5px;
            width: 160px;
            height: 45px;
            font-size: 24pt;
            font-weight: bold;
            color: white;
        }

        #gpio12.LOW {
            background-color: Black;
        }

        #gpio12.HIGH {
            background-color: Blue;
        }

    #gpio13.LOW {
            background-color: Black;
        }

        #gpio13.HIGH {
            background-color: Blue;
        }
    </style>

</head>
<body>

<div id="controls" align="center"></div>

</body>
</html>

script.py


#! /usr/bin/env /usr/bin/python3
#_*_ cording:utf-8 _*_
import webiopi
import datetime


GPIO = webiopi.GPIO

LIGHT = 12 # GPIO pin using BCM numbering
LIGHT2 = 13
HOUR_ON  = 8  # Turn Light ON at 08:00
HOUR_OFF = 18 # Turn Light OFF at 18:00

# setup function is automatically called at WebIOPi startup
def setup():
    # set the GPIO used by the light to output
    GPIO.setFunction(LIGHT, GPIO.OUT)
    GPIO.setFunction(LIGHT2, GPIO.OUT)

    # retrieve current datetime
    now = datetime.datetime.now()

    # test if we are between ON time and tun the light ON
    if ((now.hour >= HOUR_ON) and (now.hour < HOUR_OFF)):
        GPIO.digitalWrite(LIGHT, GPIO.HIGH)

# loop function is repeatedly called by WebIOPi 
def loop():
    # retrieve current datetime
    now = datetime.datetime.now()

    # toggle light ON all days at the correct time
    if ((now.hour == HOUR_ON) and (now.minute == 0) and (now.second == 0)):
        if (GPIO.digitalRead(LIGHT) == GPIO.LOW):
            GPIO.digitalWrite(LIGHT, GPIO.HIGH)

    # toggle light OFF
    if ((now.hour == HOUR_OFF) and (now.minute == 0) and (now.second == 0)):
        if (GPIO.digitalRead(LIGHT) == GPIO.HIGH):
            GPIO.digitalWrite(LIGHT, GPIO.LOW)

    # gives CPU some time before looping again
    webiopi.sleep(1)

# destroy function is called at WebIOPi shutdown
def destroy():
    GPIO.digitalWrite(LIGHT, GPIO.LOW)
    GPIO.digitalWrite(LIGHT2, GPIO.LOW)