[Plugin: Custom Login] Custom Html not working

HI! I’m workin’ with the Custom Login Plug-in at my website but the custom html doesn’t work, I checked the “use custom html” box and putted the html below on it, but it doesn’t changed the login page ??
the html:

<div id="login-custom">
<form method="post" action="https://www.centrodedesign.org.br/voto_popular/wp-login.php" id="loginform" name="loginform">
<p id="nav">
Fa?a seu login com os dados cadastrados no Portal Design Brasil. Caso você n?o tenha se cadastrado, <a href=" https://www.designbrasil.org.br/user/register">clique aqui</a>
</p>
    <p>
        <label>Nome de usuário<br>
        <input type="text" tabindex="10" size="20" value="" class="input" id="user_login" name="log"></label>
    </p>
    <p>
        <label>Senha<br>
        <input type="password" tabindex="20" size="20" value="" class="input" id="user_pass" name="pwd"></label>
    </p>
    <p class="forgetmenot"><label><input type="checkbox" tabindex="90" value="forever" id="rememberme" name="rememberme"> Lembrar</label></p>
    <p class="submit">
        <input type="submit" tabindex="100" value="Login" class="button-primary" id="wp-submit" name="wp-submit">
        <input type="hidden" value="https://www.centrodedesign.org.br/voto_popular/" name="redirect_to">
        <input type="hidden" value="1" name="testcookie">
    </p>
</form>
</div>

is there anything wrong in my html code? or should i use something diferent for this plugin?