StackedWidget overlapped

[manucorrales]

Hi, i am using a StackedWidget like this:

clientes = new DialogListaClientes();
articulos = new DialogListaArticulos();
facturas = new DialogListaFacturas();
stackedWidget->addWidget(articulos);
stackedWidget->addWidget(facturas);
stackedWidget->addWidget(clientes);
stackedWidget->setCurrentWidget(clientes);

clientes = new DialogListaClientes();
articulos = new DialogListaArticulos();
facturas = new DialogListaFacturas();
stackedWidget->addWidget(articulos);
stackedWidget->addWidget(facturas);
stackedWidget->addWidget(clientes);
stackedWidget->setCurrentWidget(clientes);

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Now whe i run the app, the three widgets are overlappedd, i mean there are the three visible. That is not correct, only one widget should be showed at time, right?

How can i fix this??