问操作链接在MVC3中不起作用

EN

@if (Request.IsAuthenticated)
{
    <text>Welcome <strong>@User.Identity.Name</strong>!
    @Html.ActionLink("Log Off", "LogOff", "Account", new { data_role = "button" })</text>
}
else
{
    @Html.ActionLink("Log On", "LogOn", "Account", new { data_role = "button" })

}

 public class AccountController : Controller
    {
        //
        // GET: /Account/

        public ActionResult Index()
        {
            return View();
        }

        public ActionResult LogOn()
        {
            return View();
        }

        public ActionResult LogOff()
        {
            return View();
        }

    }