Why there is error on refreshing the grid for auto refreshing the Grid with any data insertion or updation in SQL using SignalR Technology?

See more:

C#

ASP.NET

C#4.0

SignalR

I am unable to refresh the Grid with any data insertion or updation in SQL using SignalR Technology. I referred the below link:
http://techbrij.com/database-change-notifications-asp-net-signalr-sqldependency
I have did as follows:

<script src="http://code.jquery.com/jquery-1.8.2.min.js" type="text/javascript"></script>

    <script src="Scripts/jquery.signalR-1.1.4.js" type="text/javascript"></script>

    <script src="/signalr/hubs" type="text/javascript"></script>


      <script type="text/javascript">


          $(function () {

              // Proxy created on the fly
              var job = $.connection.scoresHub;

              // Declare a function on the score hub so the server can invoke it
              job.client.displayStatus = function () {
                  getData();
              };

              // Start the connection
              $.connection.hub.start();
              getData();
          });


          function getData() {

              var $tbl = $('#tblJobInfo');
                 $.ajax({
                  url: '../api/values',
                  type: 'GET',
                  datatype: 'json',

                  success: function (data) {
                      if (data.length > 0) {
                          $tbl.empty();
                          $tbl.append(' <tr><th>Job Title</th><th>Published Date</th><th>Expiry Date</th><th>Job Status</th></tr>');
                          var rows = [];
                          for (var i = 0; i < data.length; i++) {
                              rows.push(' <tr><td>' + data[i].JobTitle + '</td><td>' + data[i].PublishedDate + '</td><td>' + data[i].ExpiryDate + '</td><td>' + data[i].JobStatus + '</td></tr>');
                          }
                          $tbl.append(rows.join(''));
                      }
                  }
              });
          }
</script>

Hub class is as below:

public static void Show()
      {
          IHubContext context = GlobalHost.ConnectionManager.GetHubContext<ScoresHub>();
          context.Clients.All.displayStatus();
      }

I a getting the error with status code 404. What is the url to be set in the given case. I want to do this without MVC.