problem with dataGridViewand XML

[ahmed17]

data not displayed in dataGridView but when i replace dataGridView by dataGrid it work ...why?

SqlConnection sqlCon = new SqlConnection();
            SqlCommand sqlCmd = new SqlCommand();

            sqlCon.ConnectionString=@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Documents and Settings\Administrator\My Documents\ContactsDataBase.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
            sqlCmd.CommandText = "SELECT CustomerID,CustomerName FROM Customers FOR xml auto";
            sqlCmd.Connection = sqlCon;
            try
            {
                sqlCon.Open();
                XmlReader xmlReader = sqlCmd.ExecuteXmlReader();
                DataSet ds = new DataSet();
                ds.ReadXml(xmlReader, XmlReadMode.InferSchema);
                dataGridView1.DataSource = ds;
 
            }
            catch (SqlException)
            {
                MessageBox.Show("Error Occur");
            }
            finally
            {
                sqlCon.Close();
            }.