[CLOSED] Reading dynamically created items in fieldset

[debarry]

Hello!
I have a fieldset like this:

<ext:FieldSet ID="FieldSetIndex" runat="server" ColumnWidth="0.4" Title="Escolha uma ou mais op??es de filtro:" MarginSpec="10" ButtonAlign="Right">
    <Defaults>
        <ext:Parameter Name="Width" Value="240" />
        <ext:Parameter Name="LabelWidth" Value="80" />
    </Defaults>
    <Items>
        <ext:SelectBox ID="DDIdClass" runat="server" DisplayField="ClassTitulo" ValueField="IdClass" FieldLabel="Classifica??o" ondirectselect="DDIdClass_DirectSelect" >
            <Store>
                <ext:Store ID="Store3" runat="server" DataSourceID="SqlDataSourceClassList">
                    <Model>
                        <ext:Model ID="ModelClass" runat="server">
                            <Fields>
                                <ext:ModelField Name="IdClass" />
                                <ext:ModelField Name="ClassTitulo" />
                            </Fields>
                        </ext:Model>
                    </Model>            
                </ext:Store>    
            </Store>
        </ext:SelectBox>
        <ext:TextField ID="TbDocTitulo" runat="server" FieldLabel="Titulo"></ext:TextField>
        <ext:DateField ID="DocData1" runat="server" FieldLabel="De:" Format="dd/m/yyyy" />
        <ext:DateField ID="DocData2" runat="server" FieldLabel="At?:" Format="dd/m/yyyy"/>
    </Items>
</ext:FieldSet>

I can add items to it from code behind on the DDIdClass_DirectSelect event... like this:

(...)
var tf = new TextField()
{
    ID = "ID_" + varData["IdCampo"].ToString(),
    Name = Convert.ToString(varData["CamTitulo"].ToString()),
    FieldLabel = Convert.ToString(varData["CamTitulo"].ToString())
};
FieldSetIndex.Items.Add(tf);
(...)
FieldSetIndex.Render();

But, when I loop the Items on FieldSetIndex control the dinamically added items dont show up... why?

protected void BtFiltrar_OnDirectClick(object sender, DirectEventArgs e){

(...)

foreach (var Control in FieldSetIndex.Items)
{
    if (Control.XType.ToString() == "textfield")
    {
        TextField tf = (TextField)Control;
        if (tf.ID.StartsWith("ID_"))
        {
            
        }
    }
}

I can only see 4 items on FieldSetIndex.Items.Count property - where is the item created dinamically?
Am I missing something?

Thank you!