connect() problem

[harmodrew]

I've changed the code and now it works!

QPushButton *NewButton= new QPushButton(this);
NewButton->setText("Button");
 
actionsObj *ao= new actionsObj;
connect(NewButton, SIGNAL(clicked()),ao,  SLOT(ButtonClicked()));
NewButton->setGeometry(50, 40, 300, 200);
NewButton->show();
//ui->setupUi(this);

QPushButton *NewButton= new QPushButton(this);
NewButton->setText("Button");

actionsObj *ao= new actionsObj;
connect(NewButton, SIGNAL(clicked()),ao,  SLOT(ButtonClicked()));
NewButton->setGeometry(50, 40, 300, 200);
NewButton->show();
//ui->setupUi(this);

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the only problem now is that if I uncomment the last row the button isn't clickable anymore. What could be the problem?