Redirect to Session Expired Page When Session timeout for Ajax Request in Mvc 2 and jquery

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ASP.NET

MVC2

When session timeout, i have to handle two things
1. page request
2. ajax request

Page request easily redirect to Session Expired page without any fault ActionFilterAttribute

public override void OnActionExecuting(ActionExecutingContext filterContext)
       {
           HttpContext ctx = HttpContext.Current;

           // check if session is supported
           if (ctx.Session != null)
           {
               // check if a new session id was generated
               if (ctx.Session.IsNewSession)
               {

                   if (!filterContext.HttpContext.Request.IsAjaxRequest())
                   {
                       string sessionCookie = ctx.Request.Headers["Cookie"];
                       if ((null != sessionCookie) && (sessionCookie.IndexOf("ASP.NET_SessionId") >= 0))
                       {
                           var viewData = filterContext.Controller.ViewData;
                           //viewData.Model = username;
                           filterContext.HttpContext.Response.StatusCode = 504;
                           //filterContext.Result = new ViewResult { ViewName = "/Home/SessionExpire.aspx", ViewData = viewData };

                           //ctx.Response.Redirect("~/Home/Login");
                           ctx.Response.Redirect("~/Home/SessionExpire");
                       }

                   }


               }
           }

           base.OnActionExecuting(filterContext);
       }

by overriding i can easily achieve the page request..
But my problem is i cannot redirect the same thing when Ajax request from UI (jquery).
But i did this with AuthorizationContext
override the HandleUnauthorizedRequest here is the code What i used...

It redirect to session page. but it redirect inside the Master Page.. why it happens like. i think because of ajax request

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
    public class AjaxAuthorizeAttribute : AuthorizeAttribute 
    {
        protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
            {
                HttpContext ctx = HttpContext.Current;
                if (ctx.Session != null)
                {
                    // If the browser session has expired...
                    if (ctx.Session["UserName"] == null)
                    {
                        if (filterContext.HttpContext.Request.IsAjaxRequest())
                        {
                            //  filterContext.HttpContext.Response.StatusCode = 504;
                            // filterContext.Result = new JsonResult { Data = "_Logon_" };
                        //    filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary {
                        //{ "Controller", "Home" },
                        //{ "Action", "SessionExpire" }
                        //    });
                            ctx.Response.Redirect("~/Home/SessionExpire");

                        }
                        base.HandleUnauthorizedRequest(filterContext);

                    }
                }          
                   
                
            }

This is my what i used...
filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary {
//{ "Controller", "Home" },
//{ "Action", "SessionExpire" }
// });
These lines also give the same output, What this gives
ctx.Response.Redirect("~/Home/SessionExpire");

Could you help in this..Please give the reason and solution.. for this....
Problem

Problem is all working fine when redirecting the the session expired page show inside the master page...
but sessionExpire page is not inherit the master page,
but it works fine in page request.


Thank you in Advance