date time picker - time does not change

private void Save_Click(object sender, EventArgs e)
{           
      string sDispatcher = DispatcherName.Text;
      string sDPSNum = DispatchNumber.Text;
      string sDPSType = DPSType.Text;
      DateTime dtDT = dateTimePickerDT.Value;
      string sQueue = QG.Text;

      string query = "INSERT INTO dps_data(DispatcherName, DispatchNumber, DPSType, DateTime, Queue)" +"VALUES( @Dispatcher, @DPSNum, @DPSType, @DT, @Queue)";

      SqlConnection conn = new SqlConnection(connection);
      SqlCommand cmd = new SqlCommand(query, conn);
      conn.Open();

      cmd.Parameters.Add(new SqlParameter("@Dispatcher", sDispatcher));
      cmd.Parameters.Add(new SqlParameter("@DPSNum", sDPSNum));
      cmd.Parameters.Add(new SqlParameter("@DPSType", sDPSType));
      cmd.Parameters.Add(new SqlParameter("@DT", dtDT));
      cmd.Parameters.Add(new SqlParameter("@Queue", sQueue));

      int result = cmd.ExecuteNonQuery();
      if (result > 0)
      {
         MessageBox.Show("Data Added Successfully");
      }
      else
      {
         MessageBox.Show("Error in Adding Data");
      }          

      conn.Close();

      DispatchNumber.Text = String.Empty;
      DPSType.Text = String.Empty;
      QG.Text = String.Empty;
   }
}