asp.net mvc 3 Remote validation problem

This is my Model :

    [Required(ErrorMessage = "Email required!")]
    [Remote("EmailExists","User",ErrorMessage = "Email already")]
    public virtual string Email { get; set; }

View :

    @Html.TextBoxFor(x => x.Email)
    @Html.ValidationMessageFor(x => x.Email)

Controller:

    public ActionResult EmailExists(string Email)
    {
         return Json(!Email.Equals("teste@gmail.com"), 
                                      JsonRequestBehavior.AllowGet);
    }

jquery.validate.min.js and jquery.validate.unobtrusive.min.js are added. And web.config is configured as well.

When I type on Email input it fires EmailExists fine. Returns true/false as well. But it nevers shows the ErrorMessage

And I get this error :

 Erro: uncaught exception: 
 [Exception... "Cannot modify properties of a WrappedNative"
 nsresult: "0x80570034 (NS_ERROR_XP开发者_如何学运维C_CANT_MODIFY_PROP_ON_WN)"  
 location: "JS frame :: chrome://global/content/bindings/autocomplete.xml ::
 onxblpopuphiding :: line 848"  data: no]

Any idea?

---

There is nothing in your description that supposes a problem. I've created a new ASP.NET MVC 3 application using the default template, added the model:

public class MyViewModel
{
    [Required(ErrorMessage = "Email required!")]
    [Remote("EmailExists", "Home", ErrorMessage = "Email already")]
    public string Email { get; set; }
}

updated the HomeController:

public class HomeController: Controller
{
    public ActionResult Index()
    {
        return View(new MyViewModel());
    }

    [HttpPost]
    public ActionResult Index(MyViewModel model)
    {
        return View(model);
    }

    public ActionResult EmailExists(string Email)
    {
        return Json(
            !Email.Equals("teste@gmail.com"), 
            JsonRequestBehavior.AllowGet
        );
    }
}

and the ~/Views/Home/Index.cshtml view:

@model AppName.Models.MyViewModel
<script type="text/javascript" src="@Url.Content("~/scripts/jquery.validate.min.js")"></script>
<script type="text/javascript" src="@Url.Content("~/scripts/jquery.validate.unobtrusive.min.js")"></script>
@using (Html.BeginForm())
{
    @Html.LabelFor(x => x.Email)
    @Html.TextBoxFor(x => x.Email)
    @Html.ValidationMessageFor(x => x.Email)
    <input type="submit" value="OK" />
}

Validation fires fine and correct error messages are shown (tested with Chrome 10.0, IE9 and FireFox 4.0). So the question now is how does your scenario differs than this one?

---

You just need to do this:

    [Required(ErrorMessage = "Email required!")]
    [Remote("EmailExists","User")]
    public virtual string Email { get; set; }

and

    public JsonResult EmailExists(string Email)
    {
        string errorMessage = "Email already";
        if (!Email.Equals("teste@gmail.com"))
            return Json(true, JsonRequestBehavior.AllowGet);

        return Json(errorMessage, JsonRequestBehavior.AllowGet);
    }