I have adapted the TableAdapter concept to make use of the ultraganttview. I am not able to update, delete and insert the tasks dynamically.

The error is as follows.

Please advise what do I have missed out

public void UpdateChangesToDatabase()
        {
            try
            {
                dbTasksTableAdapter1.Update(DataSet1.dbTasks);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

In TableAdapter, delete, update, insert commands are defined.