Не работает QTcpSocket::readyRead

void Server::incomingConnection(int handle)
{
    qDebug() << "Connecting...";
    list[handle] = new Com_socket(handle,this);
    connect(list[handle],SIGNAL(com_disconnect(int)),this,SLOT(on_com_disconnected(int)));
}

//com_socket.h
#ifndef COM_SOCKET_H
#define COM_SOCKET_H
 
#include <QObject>
#include <QTcpSocket>
#include <QString>
 
 
class Com_socket : public QObject
{
    Q_OBJECT
public:
    explicit Com_socket(int SocketDescriptor, QObject *parent = 0);
 
signals:
    void com_disconnect(int id);
 
public slots:
    void on_ready_read();
    void on_disconnected();
 
 
private:
    QTcpSocket *sok;
    int id_sok;
};
 
#endif // COM_SOCKET_H

//com_socket.cpp
#include "com_socket.h"
 
Com_socket::Com_socket(int SocketDescriptor, QObject *parent) :
    QObject(parent)
{
    id_sok = SocketDescriptor;
    sok = new QTcpSocket(this);
    if(!sok->setSocketDescriptor(id_sok))
    {
        qDebug() << " Error binding socket";
    }
    else
    {
        qDebug() << "Command socket is created...";
    }
    connect(sok,SIGNAL(disconnected()),this,SLOT(on_disconnected()),Qt::DirectConnection);
    connect(sok,SIGNAL(readyRead()),this,SLOT(on_ready_read()),Qt::DirectConnection);
}
 
void Com_socket::on_ready_read()
{
    qDebug() << "до сюда никак не доходит";
}
 
void Com_socket::on_disconnected()
{
    sok->disconnectFromHost();
    sok->close();
    emit com_disconnect(id_sok);
    qDebug() << QString::number(id_sok) << " id is destroed";
}

int Server::Start_Server(QHostAddress host, int port)
{
    if(this->listen(host,port))
    {
        qDebug() << "Server is listening...";
        return 1;
    }
    else
    {
        qDebug() << "Don't start server...";
        return 0;
    }
}