I'm facing an issue with my ASP.NET MVC application form. Some fields that should be posted are missing, and I can't figure out why.

<form id="FormRegistroUsuario" action="/Account/AdminSecurityUserAccountAdd">
   <fieldset>
        <legend><h2 style="color:black;">Cadastro novo Usuário</h2></legend>
        <table id="tblUsuario">
            <tr>
                <td class="smallField">Username:</td>
                <td>@Html.TextBoxFor(m => m.UserName,new { @class = "validate[required]" }) </td>
                <td class="smallField" style="padding-left:10px;">Email:</td>
                <td>@Html.TextBoxFor(m => m.Email, new { @class = "validate[required,custom[email]]" }) </td>
                <td style="padding-left:10px;">Ativo:</td>
                <td>@Html.CheckBoxFor(m => m.Active)</td>
            </tr>
            <tr>
                <td class="smallField">Senha:</td>
                <td>@Html.PasswordFor(m => m.Password, new { @class = "validate[required, minSize[7]]" }) </td>
                <td style="padding-left:10px;">Repetir Senha:</td>
                <td>@Html.PasswordFor(m => m.ConfirmPassword, new { @class = "validate[required,equals[Password]]" }) </td>
                <td style="font-size:10px; padding-left:10px;">Habilitar Login com Cert. Digital:</td>
                <td>@Html.CheckBoxFor(m => m.isCertifiedAdd)
                    <div id="certDigitalBlockAdd">
                        <table>
                            <tr>
                                <td class="smallField">Tipo do Certificado:</td>
                                <td>@Html.DropDownListFor(m => m.certTypeAdd, new SelectList(Model.certTypeComboBox, "id", "type"), "Escolha...", new { @class="smallField" })</td>
                                <td style="display:none;">@Html.Hidden("certTypeAddHidden")</td>
                            </tr>
                            <tr>
                                <td>Identificação:</td>
                                <td>@Html.TextBoxFor(m => m.identifierAdd, new { @class = "validate[required] smallField" })</td>
                                <td style="display:none;">@Html.Hidden("identifierAddHidden")</td>
                            </tr> 
                        </table>
                    </div>  
                </td>
            </tr>
            <tr>
                <td class="smallField">Pergunta Secreta:</td>
                <td>@Html.TextBoxFor(m => m.SecretQuestion, new { @class = "validate[required]" }) </td>
                <td style="padding-left:10px;">Resposta:</td>
                <td>@Html.TextBoxFor(m => m.SecretQuestionPassword, new { @class = "validate[required, minSize[6]]" }) </td>
                <td></td>
                <td></td>
            </tr>                                     
        </table>
        <br />
        <div class="scrollTable" style="margin-left:20px;">
            <span class="boxTitle"><table><tr><td>Grupos Disponíveis</td></tr></table></span>
            <!-- Tipos -->
            <div class="scroller">
                <table>
                    <!-- Indices Disponíveis (Exibidos) --> 
                    @{
                    counter = 1;
                    }
                    @foreach (var role in Model.roles)
                    {
                    <tr id="@counter" class="whiteRow setIndex"> 
                        <td class="adminTipoFormRowIndex">@role</td>
                    </tr>
                        counter++;
                    }
                </table>
            </div>
        </div>
        <div class="scrollTable" style="margin-left:60px;">
            <span class="boxTitle"><table><tr><td>Grupos Atribuidos</td></tr></table></span>
            <!-- Tipos -->
            <div class="scroller scrollerindex">
                <table>
                 @{
                 counter = 1;
                 }
                 @foreach (var role in Model.roles)
                 {
                    string count = counter + "_a";
                    string inputCount = counter + "_i"; 
                    <tr id="@count" class="whiteRow unsetIndex" style="display:none;"> 
                        <td class="adminTipoFormRowIndex">@role</td>
                        <input type="hidden" id="@inputCo**strong text**unt" name="rolesGroup" value="@role" disabled="disabled"/>
                    </tr>
                     counter++;
                 }
                </table>
            </div>
        </div>
       <input type="submit" value="Salvar" class="ui-button ui-widget ui-state-default ui-corner-all ui-button-text-only button-link submitAddTipo"/>         
    </fieldset>        
</form>

JS:

$('#FormRegistroUsuario').submit(function (e) {
        e.preventDefault();
        var form = $(this);
        console.log(form.serialize());
    });

The following fields are being posted:

UserName=Guilherme
Email=grlongo.ireland%40gmail.com
Active=true
Active=false
Password=%23t1g2p3&
ConfirmPassword=%23t1g2p3&
isCertifiedAdd=true
isCertifiedAdd=false
SecretQuestion=Qual+a+senha%3F&
SecretQuestionPassword=secreta
rolesGroup=Administrador

Regardless of whether I use @Ajax.beginForm or this manual approach, the result remains the same.

• Sent using Ajax.beginForm
• and ajax submit handle
• I even created hidden extra fields to test if they would be posted (but they weren't).

Any assistance on this matter would be greatly appreciated.