display QImage on QLabel

[akasi]

Hi! I am trying to display image on the label:

Creating the image:

static const QRgb s_rgnColors[256] = 
    { 
        (unsigned int)0x000000,
        (unsigned int)0xFF0000,
        (unsigned int)0x00FF00,
        (unsigned int)0xFFFF00,
        (unsigned int)0x0000FF,
        (unsigned int)0xFF00FF,
        (unsigned int)0x00FFFF,
        (unsigned int)0xFFFFFF,
 
        // TODO: think about other colors
        (unsigned int)0x000000 
 
    };
 
QImage *m_imageFloor = new QImage(nWidth, nHeight, QImage::Format_Indexed8);
m_imageFloor->setColorTable(QVector<QRgb>::fromStdVector(
            std::vector<QRgb>(s_rgnColors, s_rgnColors + _countof(s_rgnColors)))
                        );
m_imageFloor->fill(7);

static const QRgb s_rgnColors[256] = 
    { 
        (unsigned int)0x000000,
        (unsigned int)0xFF0000,
        (unsigned int)0x00FF00,
        (unsigned int)0xFFFF00,
        (unsigned int)0x0000FF,
        (unsigned int)0xFF00FF,
        (unsigned int)0x00FFFF,
        (unsigned int)0xFFFFFF,

        // TODO: think about other colors
        (unsigned int)0x000000 

    };

QImage *m_imageFloor = new QImage(nWidth, nHeight, QImage::Format_Indexed8);
m_imageFloor->setColorTable(QVector<QRgb>::fromStdVector(
            std::vector<QRgb>(s_rgnColors, s_rgnColors + _countof(s_rgnColors)))
                        );
m_imageFloor->fill(7);

To copy to clipboard, switch view to plain text mode 

and showing it on the label

m_labelFloorPlan = new QLabel();    
m_labelFloorPlan->setSizePolicy(QSizePolicy::Expanding,
                                    QSizePolicy::Expanding);
m_labelFloorPlan->setAlignment(Qt::AlignCenter);
m_labelFloorPlan->setMinimumSize(400, 400);
m_labelFloorPlan->setPixmap(QPixmap::fromImage(*m_imageFloor, Qt::AutoColor));
setCentralWidget(m_labelFloorPlan);

m_labelFloorPlan = new QLabel();    
m_labelFloorPlan->setSizePolicy(QSizePolicy::Expanding,
                                    QSizePolicy::Expanding);
m_labelFloorPlan->setAlignment(Qt::AlignCenter);
m_labelFloorPlan->setMinimumSize(400, 400);
m_labelFloorPlan->setPixmap(QPixmap::fromImage(*m_imageFloor, Qt::AutoColor));
setCentralWidget(m_labelFloorPlan);

To copy to clipboard, switch view to plain text mode 

But the image does not appear
What am I doing wrong??

Thank you.