Send data from a beginform to controller of 3 different dropdown

Hello Developers I have a doubt of knowledge turns out that it makes three dropdown that they requested to me and the thing is that I have to do that it sends the information by means of a button to the controller in MVC 2

here the aspx code

<div class="row">

            <h2 style="font-size: 20px;">Seleccione Origen de Carga de Datos</h2>
           <%using (Html.BeginForm("OrigenDatos", "Origen", FormMethod.Post))
               {%>
            <div class="col-lg-12 col-sm-12" style="margin-top: 15px;">           

                <div class="col-lg-4 col-xs-12" style="margin-top: 5px;">
                    <label for="DropDownList2">Seleccione Origen 1</label>
                    <div class="col-xs-12">
                        <select name="ctl00$MainContent$DropDownList1" id="MainContent_DropDownList1" class="salutation " style="height: 17px; width: 202px; display: none;">
                            <option value="1">SIGO</option>
                            <option value="2">MEDIDORES PROPIOS</option>
                            <option value="3">COORDINADOR</option>
                        </select>
                    </div>
                </div>
                <div class="col-lg-4 col-xs-12" style="margin-top: 5px;">
                    <label for="DropDownList2">Seleccione Origen 2</label>
                    <div class="col-xs-12">
                        <select name="ctl00$MainContent$DropDownList2" id="MainContent_DropDownList2" class="salutation " style="height: 17px; width: 202px; display: none;">
                            <option value="1">SIGO</option>
                            <option value="2">MEDIDORES PROPIOS</option>
                            <option value="3">COORDINADOR</option>
                        </select>
                    </div>
                </div>
                <div class="col-lg-4 col-xs-12" style="margin-top: 5px;">
                    <label for="DropDownList2">Seleccione Origen 3</label>
                    <div class="col-xs-12">
                        <select name="ctl00$MainContent$DropDownList3" id="MainContent_DropDownList3" class="salutation " style="height: 17px; width: 202px; display: none;">
                            <option value="1">SIGO</option>
                            <option value="2">MEDIDORES PROPIOS</option>
                            <option value="3">COORDINADOR</option>
                        </select>
                    </div>
                </div>                  
                 <input type="submit" value="Enviar" class="btn btn-primary" style="margin-top: 1px;">
                   <%} %>
               </div>
               </form>                
        </div>            
    </div>  

We know how to receive this info and save it in different objects (According to its origin = origin 1, origin 2, origin 3)

I'm trying to do it like that but I do not enter the controller

public class OrigenController : Controller
{
    // GET: Origen
    public ActionResult Origen()
    {
        return View("~/Views/Origen/Origen.aspx");
    }
    [HttpPost]
    public ActionResult OrigenDatos(string MainContent_DropDownList1, string MainContent_DropDownList2, string MainContent_DropDownList3)
    {
        var origen1 = MainContent_DropDownList1;
        var origen2 = MainContent_DropDownList2;
        var origen3 = MainContent_DropDownList3;

        return View("~/Views/Origen/Origen.aspx");
    }
}

What am I doing wrong?

Reply is welcome.