ASP.NET MVC 2 - Failed with jquery ajax response

I do not understand this error, do not generate error in "JsonResult Test ()", I am doing other projects as ASP.NET MVC

Thanks

Error:

System.InvalidOperationException: This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet.

[InvalidOperationException: This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet.]
   System.Web.Mvc.JsonResult.ExecuteResult(ControllerContext context) +263733
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +10
   System.Web.Mvc.<>c__DisplayClass14.<InvokeActionResultWithFilters>b__11() +20
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +251
   System.Web.Mvc.<>c__DisplayClass16.<InvokeActionResultWithFilters>b__13() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +178
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +314
   System.Web.Mvc.Controller.ExecuteCore() +105
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +39
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +7
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__4() +34
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +59
   System.Web.Mvc.MvcHandler.EndProcessRe开发者_StackOverflowquest(IAsyncResult asyncResult) +44
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +7
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8678910
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

c#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Tesis.Controllers
{
    public class AnalysisSourceDataController : Controller
    {
        //
        // GET: /AnalysisSourceData/

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

        public JsonResult Test()
        {
            return Json(new { mymsg = "my msg" });
        }
    }
}

javascript

<script type="text/javascript">
    $(function() {
        $.getJSON("/AnalysisSourceData/Test", function(data) {
            alert(data.mymsg);
        });
    });
</script>

what don't you understand? The error could hardly be more descriptive. It's a security feature to prevent JSON hijacking, you can disable it like this..

 return Json(new { mymsg = "my msg" }, JsonRequestBehavior.AllowGet);

but you should understand the implications.