$ .mobile é indefinido (Worklight + jQuery Mobile)

Eu tenho o html principal:

<!DOCTYPE html>     
<html>
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0" />
    <title>Home</title>
    <link rel="stylesheet" href="js/jquery.mobile-1.2.0/jquery.mobile-1.2.0.css" type="text/css" media="screen" title="no title" charset="utf-8" />
    <link rel="stylesheet" href="css/Home.css" type="text/css" media="screen" title="no title" charset="utf-8" />
    <link rel="stylesheet" href="css/theme-addon.css" type="text/css" media="screen" title="no title" charset="utf-8" />

    <script src="js/jquery-1.7.2.min.js" type="text/javascript" charset="utf-8"></script>
    <script src="js/jquery.mobile-1.2.0/jquery.mobile-1.2.0.min.js" type="text/javascript" charset="utf-8"></script>
</head>
<body id="content" style="display: none">

    <div data-role="page" id="homePage">
        <div data-role="header"><div class="ui-title">Home</div></div>
        <div data-role="content" style="text-align: center">
            <a data-role="button" id="login" class="fullWidth">Login</a>
        </div>
    </div>

    <script src="js/initOptions.js"></script>
    <script src="js/Home.js" type="text/javascript" charset="utf-8"></script>
    <script src="js/messages.js"></script>

</body>

Então no Home.js:

// Worklight comes with the jQuery framework bundled inside. If you do not want to use it, please comment out the line below.
window.$ = window.jQuery = WLJQ;

function wlCommonInit(){
    // Common initialization code goes here
}

$("#homePage").live('pagecreate', function(event,ui) {
    $('#login').click(function(){
        $.mobile.changePage($('#nextPage.html'));
    });
});

Quando eu toco no botão de login, dá erro$.mobile is undefined nesta linha:

$.mobile.changePage($('#nextPage.html'));

Existe alguém que possa dar uma ideia do que há de errado com o meu código? Eu acredito que faço as coisas certas? Além disso, eu uso5.0.2.407-developer-edition Versão do Worklight.

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