DataRow.RowState

[da_cobra]

I'm trying out this article on codeproject for my DataGridView: Autosaving

http://www.codeproject.com/cs/databa...select=2075150

But none of my rows are getting saved to the database when I change to a new row or close my form.
My problem seems to be in this code :

private void UpdateRowToDatabase()
        {
            if (LastDataRow != null)
            {
                if (LastDataRow.RowState == DataRowState.Modified)
                {
                    tblMaintenanceWorkTableAdapter.Update(LastDataRow);
                }
            }
        }

I never get to the update function because the RowState doesn't seem to be modified, although I fill in all the columns of my row.

I also checked the LastDataRow and it is filled with a row through this code :

private void tblMaintenanceWorkBindingSource_PositionChanged(object sender, EventArgs e)
        {
            // if the user moves to a new row, check if the 
            // last row was changed
            BindingSource thisBindingSource = (BindingSource)sender;
            DataRow ThisDataRow = ((DataRowView)thisBindingSource.Current).Row;
                        
            if (ThisDataRow == LastDataRow)
            {
                // we need to avoid to write a datarow to the 
                // database when it is still processed. Otherwise
                // we get a problem with the event handling of 
                //the DataTable.
                throw new ApplicationException("It seems the" +
                        " PositionChanged event was fired twice for" +
                        " the same row");
            }

            UpdateRowToDatabase();
            
            // track the current row for next 
            // PositionChanged event
            LastDataRow = ThisDataRow;
        }

so what do you guys think I'm still doing wrong?
Did I oversee something in the article?

[da_cobra]

Noone out there that can help me or point me in the right direction?