DisconnectFromHost generate a runtime error

[Darthspawn]

I have a qtcpSocket in a QThread, when i must disconnect, the program crash for a runtime error.

void ThreadSocket::run()
{
    mpqtcp_Socket = new QTcpSocket(this);
    connect (mpqtcp_Socket, SIGNAL (connected()), SLOT(SocketConnected()) );
    //connect (mpqtcp_Socket, SIGNAL (connectionClosed()), SLOT(SocketClosed()), Qt::DirectConnection );
    connect (mpqtcp_Socket, SIGNAL (disconnected()), SLOT(SocketClosed()));
 
    connect (mpqtcp_Socket, SIGNAL (readyRead()), SLOT(SocketAnswer()), Qt::DirectConnection);
    connect (mpqtcp_Socket, SIGNAL (error(int)), SLOT(SocketError(int)) );
 
    mpqtcp_Socket->connectToHost (mqstr_Address, mint_Port);
    exec();
}

void ThreadSocket::run()
{
    mpqtcp_Socket = new QTcpSocket(this);
    connect (mpqtcp_Socket, SIGNAL (connected()), SLOT(SocketConnected()) );
    //connect (mpqtcp_Socket, SIGNAL (connectionClosed()), SLOT(SocketClosed()), Qt::DirectConnection );
    connect (mpqtcp_Socket, SIGNAL (disconnected()), SLOT(SocketClosed()));

    connect (mpqtcp_Socket, SIGNAL (readyRead()), SLOT(SocketAnswer()), Qt::DirectConnection);
    connect (mpqtcp_Socket, SIGNAL (error(int)), SLOT(SocketError(int)) );

    mpqtcp_Socket->connectToHost (mqstr_Address, mint_Port);
    exec();
}

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disconnect code:

void ThreadSocket::Disconnect()
{
    mpqtcp_Socket->disconnectFromHost();
    mpqtcp_Socket->waitForDisconnected();
}

void ThreadSocket::Disconnect()
{
    mpqtcp_Socket->disconnectFromHost();
    mpqtcp_Socket->waitForDisconnected();
}

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I'm doing something wrong? thanks in advance!

Sam