QudpSocket: Speed Issue

[jepessen]

Hi.
I'm trying to create a connection between two application using QUdpSocket.

I send many udp packet consequently, for example

uiDatawritten = m_pxUdpSocket->writeDatagram(xByteArray.data(), xByteArray.size(), *m_pxHostAddress, UDPPORT);
uiDatawritten2 = m_pxUdpSocket->writeDatagram(xByteArray2.data(), xByteArray2.size(), *m_pxHostAddress, UDPPORT);

uiDatawritten = m_pxUdpSocket->writeDatagram(xByteArray.data(), xByteArray.size(), *m_pxHostAddress, UDPPORT);
uiDatawritten2 = m_pxUdpSocket->writeDatagram(xByteArray2.data(), xByteArray2.size(), *m_pxHostAddress, UDPPORT);

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But, when I do it, the second application receives only the last packet, and the first is discarded.

I'd like to known if it's a known issue, and how I can resolve it, also considering that I can't use TCP and I need to send packets as fast as possible.
Any help is appreciated.