MVC with Entity Framework My DropDownList isn't a dropdownlist

I've been following this tutorial which shows you how to populate a drop down list. However my create page doesn't show a drop down list at all but shows this

This is my drop down list code in my UserController.cs

private void PopulateAdministratorsDropDownList(object selectedAdministrator = null)
{
    var administratorQuery = from d in db.Administrators
                           orderby d.AdministratorTitle
                             select d;
    ViewBag.AdministratorID = new SelectList(administratorQuery, "AdministratorID", "AdministratorTitle", selectedAdministrator);
}

Views\User\Create.cshtml

@model RecreationalServicesTicketingSystem.Models.User
....
@using (Html.BeginForm()) {
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(true)

    <fieldset>
        <legend>User</legend>

        <div class="editor-label">
            @Html.LabelFor(model => model.LastName)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.LastName)
            @Html.ValidationMessageFor(model => model.LastName)
        </div>
        .... // more controls
        <div class="editor-label">
            @Html.LabelFor(model => model.AdministratorID)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.AdministratorID)
            @Html.ValidationMessageFor(model => model.AdministratorID)
        </div>
        ....
        <p>
            <input type="submit" value="Create" />
        </p>

    </fieldset>
}

UserController.cs

public ActionResult Create()
{
    PopulateAdministratorsDropDownList();
    return View();
}

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "LastName, FirstMidName, EnrollmentDate,AdministratorID, DepartmentID, DepotID")]User user)
{
    try
    {
        if (ModelState.IsValid)
        {
            db.Users.Add(user);
            db.SaveChanges();
            return RedirectToAction("Index");
        }
    }
    catch (DataException /* dex */)
    {
        ModelState.AddModelError("", "Unable to save changes. Try again, and if the problem persists see your system administrator.");
    }
    PopulateAdministratorsDropDownList(user.AdministratorID);
    return View(user);
}

private void PopulateAdministratorsDropDownList(object selectedAdministrator = null)
{
    var administratorQuery = from d in db.Administrators
                             orderby d.AdministratorTitle
                             select d;
    ViewBag.AdministratorID = new SelectList(administratorQuery, "AdministratorID", "AdministratorTitle", selectedAdministrator);
}