I promoted a QListWidget as a class listWidget but i get a error as mentioned above, i am not sure what's going wrong here.

listWidget.h
@

#ifndef LISTWIDGET_H
#define LISTWIDGET_H

#include <QWidget>
#include<QPixmap>
#include<QVariant>
#include<QListWidget>
#include"ImageRegistrationImplementation.h"
#include "ui_ImageRegistration.h"

class listWidget : public QListWidget
{
Q_OBJECT
public:
explicit listWidget(QWidget *parent = 0);

};
#endif // LISTWIDGET_H

@

listWidget.cpp

@
#include "listWidget.h"
#include "ui_ImageRegistration.h"
#include "ImageRegistrationImplementation.h"
#include <QtGui>
#include<QVariant>

listWidget::listWidget(QWidget *parent)
: QListWidget(parent)
{
Ui::ImageRegistration *uiData;
ImageRegistration *classData=new ImageRegistration();
...
...
...
...

}

@

I guess, there is some problem in the way i am accessing th ui files, but i am not clear what's going wrong here.