Qt when calling connect gives me an error

I'm having problem with connect. My problem is: I have a class called eventos (events) that will manage all the objects events (buttons, lists etc...) but when I call an event, it gives me an memory reading error. Here is my code:

My main class:

#include "ratagbc.h"
#include "eventos.h"

RataGBC::RataGBC(QWidget *parent, Qt::WFlags flags)
    : QMainWindow(parent, flags)
{
    eventos e;
    connect(ui.runBtn,SIGNAL(clicked()),this,SLOT(e.on_runBtn_clicked()));
    ui.setupUi(this);
}

RataGBC::~RataGBC()
{

}

eventos.h:

#include QDialog.h
#include "ui_ratagbc.h"

class eventos : public QDialog, public Ui::RataGBCClass { 
    Q_OBJECT    
public:     
        eventos(void);
    ~eventos(void);

    public slots:       void on_runBtn_clicked(); };

eventos.cpp:

#include "eventos.h"
#include <QMessageBox>


eventos::eventos(void)
{
}


eventos::~eventos(void)
{
}

void eventos::on_runBtn_clicked()
{
    QMessageBox qb;
    qb.setText("Rata");
    qb.exec();
}

The error is:

Unhandled exception at 0x776a15de in RataGBC.exe: 0xC0000005: Access violation reading location 0x00000964.

Debugging I realized (or guessed?) that the error seems to be in the SINGAL call.

The object eventos e has scope and lifetime limited by a constructor body. You should make it as a member of RataGBC; or inherit it from QObject (I don't see eventos.h, but I believe you have already inherited it as far as you use signal-slot mechanism for it) and create it dymamically as a child of RataGBC, like this

eventos * e = new eventos();
e->setParent(this);

or don't make it child, but just delete it in the destructor of the RataGBC