Problem in Consuming DataSet object via WCF Service

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WCF

I am a beginner WCF developer. I was working through the “WCF Service Library with Windows Service Hosting Article date 15th, July 2009”.

I was able to successfully follow the article till Consuming WCF Service step. As author says while testing the WCF Test Client provided by Microsoft, GetJobs() was not available. That is OK.

In ConsumeJobs step the “DataSet” object is not retrieving any data. Anybody is successful in this step? If so please help mehow to use DataSet to retrieve data from database in WCF.
Here is my code:

private void btnShowAll_Click(object sender, EventArgs e)
{
  txtMsg.Text = "Program is inside show all click";
  dataGridView1.BackgroundColor = SystemColors.Window;
  JobsService.JobsClient obj = new ConsumeJobs.JobsService.JobsClient();
  DataSet ds = new DataSet();
  ds = obj.GetJobs();
  dataGridView1.DataSource = ds;
  dataGridView1.DataMember = "Jobs";
}