Meter is not disconnecting or reconnecting using gurux dlms .net code

Hi,
we are using gurux code to disconnect the meter but unfortunately that is not working but if we try with gurux director its working so our assumption is there is something wrong with invocation counter so can you please suggest how set invocation counter for disconnection/reconnection

GXDLMSDisconnectControl dc = new GXDLMSDisconnectControl(obj.LogicalName); // Replace LN with actual one
dc.ControlMode = Gurux.DLMS.Objects.Enums.ControlMode.Mode4;
dc.OutputState = true;
//if (Client.CanWrite(dc, 4))
//{
// reply.Clear();
// conn.ReadDataBlock(Client.Write(dc, 4), reply);
//}
Client.Write(dc, 4);
var command = dc.RemoteReconnect(Client);

conn.ReadDataBlock(command, reply);

TX:7E A0 2E 03 61 32 DA 85 E6 E6 00 CB 20 30 00 00 00 18 5C 6D E2 60 72 2F 13 F7 10 A8 AE A7 CD B1 4B 66 3F 45 92 7F A5 BD CB 4F 97 84 7B 91 2B 7E

Gurux.DLMS.GXDLMSException: Access Error : Device reports a hardware fault

but its working fine with guruxdirector