checksum offload Qt4

[qbox]

Hi
I write one application in Qt4
I have this code for making connection


clientSocket.abort();
clientSocket.connectToHost(QHostAddress::LocalHost , 5555);


and I have this code for sending a packet:


QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_0);
out << (quint16)0;
out << packet;
out.device()->seek(0);
out << (quint16)(block.size() - sizeof(quint16));

clientSocket.write(block);

I scanning with wireshark to see if packet is send or not. The packet is send but in wireshark I see this error

Checksum: 0xfe3f [incorrect, should be 0x0865 (maybe caused by "TCP checksum offload"?)]
Probably the packed will be discarded on receiving. Any Idea what is this and how to make a packet with good check sum?

[qbox]

I try another quicker code

QString message="AAAAAAAAAAAAAA";
QByteArray msg = message.toUtf8();
QByteArray block = "MESSAGE " + QByteArray::number(msg.size()) + " " + msg;
clientSocket.write(block);

I still have same error and the packed is not discarded.
:popcorn: