Qt4.1, TCP-server, Ethernet, Windows

My code gives me packets loss:

Code:

clientConnection = new QTcpSocket(this);   
    tcpServer = new QTcpServer();
    connect(tcpServer, SIGNAL(newConnection()), this, SLOT(newConnect()));
 
void frmMain::newConnect()
{
    clientConnection = tcpServer->nextPendingConnection();    
 
    connect(clientConnection, SIGNAL(readyRead()),
            this, SLOT(receivePkg()));   
 
    connect(clientConnection, SIGNAL(disconnected()),
            clientConnection, SLOT(deleteLater()));            
}
 
void frmMain::receivePkg()
{
    read_size = clientConnection->read(buf_c, READ_BUF_SIZE);

Tell me how to create TCP-server:

-received 10+ packets (1 packet length = 200+ bytes) per 1 ms
-received packets for 10+ min
-without packets loss

May be I have to use another thread and set priority to thread.

Give me server code, please.