Datagridview update help

[eljapo4]

Hi everyone, I'm working on my first winforms EDM project and I'm trying to populate a Datagridview with a list of Presenters that can be updated by a user. The cols in my grid are Name and Email address(DataGridViewLinkColumn). So far I have been able to display the grid correctly but when I try to add a new row my changes are not being saved back to the DB even though I get a msgbox to say they have. Here's how I'm populating my DGV:

private void frmPresenters_Load(object sender, EventArgs e)
{
  dal = new DataAccessLayer();
 
  try
  {
    //Get the List of Contacts from the DAL and bind to the DataGrid
    source = new BindingSource();
    source.DataSource = dal.GetPresentersList();
 
   this.dgvPresenters.DataSource = source;
   dgvPresenters.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
   dgvPresenters.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
  }
  catch (Exception ex)
  {
     MessageBox.Show(string.Format("Exception occurred: {0}", ex.Message));
  }
}

I'm unable to edit the Email address field as well (i think this may be a seperate thread)

all updates are made by clicking a button:

private void btnSave_Click(object sender, EventArgs e)
{
   try
   {
      // Save object changes to the database, display a message, and refresh the form.
      this.source.EndEdit();
      //dal.entities.SaveChanges();
      MessageBox.Show("Changes saved to the database.");
      this.Refresh();
   }
   catch (Exception ex)
   {
      MessageBox.Show(ex.Message);
   }
}

Can anyone help me please?