MVC routing issue, need help to insert parameter

I have a form in a partialView

     @using (Html.BeginForm(null, null, new { controller = "Module", action="ModuleIndex", module="" }, FormMethod.Get, new { id = "frmMDR" }))
        {
            @Html.RadioButton("mdrSelector", "Maintenance", false, new { id = "rdoMaintenance" })<label for="rdoMaintenance">M</label>
            @Html.RadioButton("mdrSelector", "Diagnostics", false, new { id = "rdoDiagnostics" })<label for="rdoDiagnostics">D</label>
            @Html.RadioButton("mdrSelector", "Repair", false, new { id = "rdoRepair" })<label for="rdoRepair">R</label>
            @Html.Hidden("hdnVehicle", null, new { id="hdnVehicle"})
        }

When I choose a radio button, how can I populate the module parameter with the selected radio buttons value? I'm using jQuery to submit the form on the radio buttons change event.

   $(':radio').change(function () {

            $('#frmMDR').submit();
        });

Here is my controller method

   public ActionResult ModuleIndex(string module)
    {

        switch (module)
        {
            case "Maintenance":
                return RedirectToRoute(new { area = module, controller = "Maintenance" });

            case "Diagnostics":
                return RedirectToRoute(new { area = module, controller = "Diagnostics" });

            case "Repair":
                return RedirectToRoute(new { area = module, controller = "Repair" });

            default:
                return RedirectToRoute(new { area开发者_开发技巧 = module, controller = "Maintenance" });

        }

    }

and lastly here is my routing config

   routes.MapRoute(
          "Module", // Route name
          "Module/ModuleIndex/{module}",
          new { controller = "Module", action = "ModuleIndex", module = "" }
          );

What am I not doing correctly? Any tips or help is always appreciated.

Kind Regards,

~ck in San Diego

---

According to the first example on this msdn site, the first string argument must be the same as the controller argument name:

@Html.RadioButton("module", "Maintenance", false)
@Html.RadioButton("module", "Diagnostics", false)
@Html.RadioButton("module", "Repair", false)