Captcha is not loading While adding Screen restriction - asp.net-mvc-4

Question

I am developing my project in MVC. In registration page i am using captcha control. It is working Fine. But my problem is i am adding screen restriction to some of my pages. While adding screen restriction captcha is not getting loaded.
can anyone please help me?
I have added the screen restriction code below
public class ScreenRestriction : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var routeData = filterContext.HttpContext.Request.RequestContext.RouteData;
string currentAction = routeData.GetRequiredString("action");
string currentController = routeData.GetRequiredString("controller");
string currentArea = routeData.Values["area"] as string;
var request = filterContext.HttpContext.Request;
var response = filterContext.HttpContext.Response;
var session = filterContext.HttpContext.Session;
if ((currentAction != "Login" && currentAction != "Create" && currentAction != "GetUser" && currentAction != "Index" ) == true)
{
if (session["UserID"] == null)
{
if (request.IsAjaxRequest())
{
response.StatusCode = 590;
}
else
{
var url = new UrlHelper(filterContext.HttpContext.Request.RequestContext);
response.Redirect(url.Action("Login", "CU"));
}
filterContext.Result = new EmptyResult();
}
else
{
if (!filterContext.HttpContext.Request.IsAjaxRequest())
{
}
}
}
base.OnActionExecuting(filterContext);
}
Screen restriction in Filters
public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new HandleErrorAttribute());
filters.Add(new ScreenRestriction());
}
}
I have added the registration page code below
View--
#model SYTMain.Models.tblUser
#using CaptchaMvc.HtmlHelpers
#using CaptchaMvc;
#{
ViewBag.Title = "Create";
Layout = "~/Views/Shared/_Layout_for_registration.cshtml";
}
#using (Html.BeginForm())
{
#Html.AntiForgeryToken()
#Html.ValidationSummary(true)
<fieldset>
<legend>tblUser</legend>
<div class="editor-label">
#Html.LabelFor(model => model.FirstName)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.FirstName)
#Html.ValidationMessageFor(model => model.FirstName)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.MiddleName)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.MiddleName)
#Html.ValidationMessageFor(model => model.MiddleName)
</div>
<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>
<div class="editor-label">
#Html.LabelFor(model => model.EmailID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.EmailID)
#Html.ValidationMessageFor(model => model.EmailID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.Password)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.Password)
#Html.ValidationMessageFor(model => model.Password)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.AddressId, "Address1")
</div>
<div class="editor-field">
#Html.EditorFor(model => model.tblAddress.Address1)
#Html.ValidationMessageFor(model => model.tblAddress.Address1)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.AddressId, "Address2")
</div>
<div class="editor-field">
#Html.EditorFor(model => model.tblAddress.Address2)
#Html.ValidationMessageFor(model => model.tblAddress.Address2)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.MobileNumber)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.MobileNumber)
#Html.ValidationMessageFor(model => model.MobileNumber)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.WorkNumber)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.WorkNumber)
#Html.ValidationMessageFor(model => model.WorkNumber)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.HomeNumber)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.HomeNumber)
#Html.ValidationMessageFor(model => model.HomeNumber)
</div>
#Html.Captcha(3)
<br />
<p class="Error"> #ViewBag.ErrMessage </p>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
Controller
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(tblUser tbluser)
{
string val = System.Configuration.ConfigurationManager.AppSettings["CUTypeId"];
int code = Convert.ToInt32(val);
Session["Emailid"] = tbluser.EmailID.Trim();
if (ModelState.IsValid && this.IsCaptchaValid("Captcha Not Valid") )
{
EmailManager.SendConfirmationEmailName(tbluser.EmailID, tbluser.FirstName);
tbluser.UserTypeId = code;
db.tblUsers.Add(tbluser);
db.SaveChanges();
return RedirectToAction("Login", new { Email = tbluser.EmailID });
}
ViewBag.BusinessCategoryId = new SelectList(db.tblBusinessCategories, "BusinessID", "BusinessName", tbluser.BusinessCategoryId);
ViewBag.UserTypeId = new SelectList(db.tblUserTypes, "UserTypeID", "UserType", tbluser.UserTypeId);
ViewBag.AddressId = new SelectList(db.tblAddresses, "AddressID", "Address1", tbluser.AddressId);
ViewBag.ErrMessage = "Error: Captcha not valid";
return View(tbluser);
}