connecting QTcpSocket::readyRead() to the slot QTextArea::append()

[OriginalCopy]

Incoming data and the end of the pipe is not appended to the textarea and I don't see any mistake in the code. Could you give me a hand please ?

//******************** The declaration file
#ifndef IRC_CONNECTION_H_
# define IRC_CONNECTION_H_
# include <QTcpSocket>
class QTcpSocket;
 
class QBuffer;
 
class IrcConnection : public QTcpSocket {
    Q_OBJECT
 
public:
    IrcConnection(QTcpSocket *parent = 0);
    ~IrcConnection();
signals:
    void incomingIrcMessage(QString &);
private slots:
    void receiveMessage();
    void ircRegister();
private:
    QBuffer *buffer;
};
 
#endif //IRC_CONNECTION_H_
 
//******************** The implementation file
 
#include "IrcConnection.h"
#include <QBuffer>
#include <QTcpSocket>
#include <QString>
#include <QObject>
 
IrcConnection::IrcConnection(QTcpSocket *parent) : QTcpSocket(parent) {
    buffer = new QBuffer(this);
    QObject::connect(this,SIGNAL(readyRead()),this,SLOT(receiveMessage()));
    QObject::connect(this,SIGNAL(connected()),this,SLOT(ircRegister()));
}
 
IrcConnection::~IrcConnection() {
    //TODO cleanup
}
void IrcConnection::receiveMessage() {
    qint64 bytes = buffer->write(readAll());
    buffer->seek(buffer->pos() - bytes);
    while(buffer->canReadLine()) {
        QString line = buffer->readLine();
        emit incomingIrcMessage(line);
    }
}
void IrcConnection::ircRegister() {
    write("NICK kdsjghsdkjghsdkjgnUSER "anonymous.com" "irc.undernet.org" :http://localhostn");
}
 
//******************** main.cpp
#include <QApplication>
#include <QVBoxLayout>
#include <QTextEdit>
#include <QtGlobal>
#include "IrcConnection.h"
 
int main(int argc, char *argv[]) {
    QApplication app(argc,argv);
    QVBoxLayout *vbox = new QVBoxLayout;
    QTextEdit *textarea = new QTextEdit;
    vbox->addWidget(textarea);
    textarea->setReadOnly(true);
 
    IrcConnection *irc = new IrcConnection;
 
    QObject::connect(irc,SIGNAL(incomingIrcMessage(QString &)),textarea,SLOT(append(QString &)));
    QString host("irc.freenode.org");
    qint16 port = 6667;
    textarea->append("Connecting...n");
    qDebug("Connecting...");
    irc->connectToHost(host,port);
    textarea->show();
    return app.exec();
}

//******************** The declaration file
#ifndef IRC_CONNECTION_H_
# define IRC_CONNECTION_H_
# include <QTcpSocket>
class QTcpSocket;

class QBuffer;

class IrcConnection : public QTcpSocket {
    Q_OBJECT

public:
    IrcConnection(QTcpSocket *parent = 0);
    ~IrcConnection();
signals:
    void incomingIrcMessage(QString &);
private slots:
    void receiveMessage();
    void ircRegister();
private:
    QBuffer *buffer;
};

#endif //IRC_CONNECTION_H_

//******************** The implementation file

#include "IrcConnection.h"
#include <QBuffer>
#include <QTcpSocket>
#include <QString>
#include <QObject>

IrcConnection::IrcConnection(QTcpSocket *parent) : QTcpSocket(parent) {
    buffer = new QBuffer(this);
    QObject::connect(this,SIGNAL(readyRead()),this,SLOT(receiveMessage()));
    QObject::connect(this,SIGNAL(connected()),this,SLOT(ircRegister()));
}

IrcConnection::~IrcConnection() {
    //TODO cleanup
}
void IrcConnection::receiveMessage() {
    qint64 bytes = buffer->write(readAll());
    buffer->seek(buffer->pos() - bytes);
    while(buffer->canReadLine()) {
        QString line = buffer->readLine();
        emit incomingIrcMessage(line);
    }
}
void IrcConnection::ircRegister() {
    write("NICK kdsjghsdkjghsdkjgnUSER "anonymous.com" "irc.undernet.org" :http://localhostn");
}

//******************** main.cpp
#include <QApplication>
#include <QVBoxLayout>
#include <QTextEdit>
#include <QtGlobal>
#include "IrcConnection.h"

int main(int argc, char *argv[]) {
    QApplication app(argc,argv);
    QVBoxLayout *vbox = new QVBoxLayout;
    QTextEdit *textarea = new QTextEdit;
    vbox->addWidget(textarea);
    textarea->setReadOnly(true);
   
    IrcConnection *irc = new IrcConnection;
   
    QObject::connect(irc,SIGNAL(incomingIrcMessage(QString &)),textarea,SLOT(append(QString &)));
    QString host("irc.freenode.org");
    qint16 port = 6667;
    textarea->append("Connecting...n");
    qDebug("Connecting...");
    irc->connectToHost(host,port);
    textarea->show();
    return app.exec();
}

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[OriginalCopy]

problem solved, the SLOT and SIGNAL were having different stack signatures