Access and C#.net Update Problem

int val = 0;
                OleDbCommand cmdUpdateCommand = new OleDbCommand("Update LineDetails set Shift=?, LineNumber=?, Active=?, NoPlan=?, OOS=?, Cleaning=?, NoMan=?, OOSDetails=?, [Date]=? where Shift=?", conn);

                cmdUpdateCommand.Parameters.Add("Shift", OleDbType.Char).Value = dgvLineDetails.CurrentRow.Cells["Shift"].Value;
                cmdUpdateCommand.Parameters.Add("LineNumber", OleDbType.Integer).Value = dgvLineDetails.CurrentRow.Cells["LineNumber"].Value;
                cmdUpdateCommand.Parameters.Add("Active", OleDbType.Boolean).Value = dgvLineDetails.CurrentRow.Cells["Active"].Value;
                cmdUpdateCommand.Parameters.Add("NoPlan", OleDbType.Boolean).Value = dgvLineDetails.CurrentRow.Cells["NoPlan"].Value;
                cmdUpdateCommand.Parameters.Add("OOS", OleDbType.Boolean).Value = dgvLineDetails.CurrentRow.Cells["OOS"].Value;
                cmdUpdateCommand.Parameters.Add("Cleaning", OleDbType.Boolean).Value = dgvLineDetails.CurrentRow.Cells["Cleaning"].Value;
                cmdUpdateCommand.Parameters.Add("NoMan", OleDbType.Boolean).Value = dgvLineDetails.CurrentRow.Cells["NoMan"].Value;
                cmdUpdateCommand.Parameters.Add("OOSDetails", OleDbType.Char).Value = dgvLineDetails.CurrentRow.Cells["OOSDetails"].Value;
                cmdUpdateCommand.Parameters.Add("Date", OleDbType.Date).Value = dgvLineDetails.CurrentRow.Cells["Date"].Value;

                conn.Open();
                val = cmdUpdateCommand.ExecuteNonQuery();
                if (val > 0)
                {
                    MessageBox.Show("Shift Updated");
                }
                conn.Close();