QWebView unknown problem

[morfei]

I'm sure that the problem is in the code but i'm really newbie in Qt and can't find it.As you can see at the code I'm trying to create a connection between a buton and the webview object but it doesnt work when i test it.I keep pushing the buton but there's no change in the page.So here's the code:

#include <QApplication>
#include <QMainWindow>
#include "ui_test.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Ui::MainWindow ui;
    QMainWindow *main = new QMainWindow;
    ui.setupUi(main);
ui.webView->load(QUrl("http://www.trolltech.com/"));    
    ui.webView->show();
QObject::connect(ui.cmdBtn,SIGNAL(clicked()),ui.webView,SLOT(load(QUrl("http://www.google.com/"))));
    main->show();
    return app.exec();
}

#include <QApplication>
#include <QMainWindow>
#include "ui_test.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Ui::MainWindow ui;
    QMainWindow *main = new QMainWindow;
    ui.setupUi(main);
ui.webView->load(QUrl("http://www.trolltech.com/"));    
    ui.webView->show();
QObject::connect(ui.cmdBtn,SIGNAL(clicked()),ui.webView,SLOT(load(QUrl("http://www.google.com/"))));
    main->show();
    return app.exec();
}

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Please help me, if you can!