How can I get my custom page while entering invalid parameter in url

web.config file code

<system.webServer>
<httpErrors errorMode="Custom" existingResponse="Replace">
      <remove statusCode="404" />
      <error statusCode="404" responseMode="ExecuteURL" path="/Error/PageNotFound" />    
      <remove statusCode="500" />
      <error statusCode="500" responseMode="ExecuteURL" path="/Error" /> 
      
    </httpErrors>
</system.webServer>

Controller

    public class ErrorController : Controller
    {
        //
        // GET: /Error/
        public ActionResult Index()
        {
            Response.StatusCode = 500;
            return View("Error");
        }

        public ActionResult PageNotFound()
        {
            Response.StatusCode = 404;
            return View();
        }
	}

Everything is going to fine here.
But when i pass invalid parameter(localhost/home/index/55555) then it does't redirected to my custom page.(55555 is 

not a valid parameter here).
Please can anyone help regarding this