QGridLayout problem

I'm trying to set a VerticalLayout inside a QGridLayout, inside the vertical layout i have set some QCheckBox, but i cant check them when runing the program... i've tried them like radio buttons and checkbox....

The main layout is created in other function, but the other elements on it work fine.

Code:

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radio1=new QCheckBox("Foto",this);
    radio2=new QCheckBox("Ráfaga",this);
    radio3=new QCheckBox("Video",this);
 
     QBoxLayout* panelVerticalBotones=new QVBoxLayout;
     panelVerticalBotones->addWidget(radio1, Qt::AlignTop);
     panelVerticalBotones->addWidget(radio2);
     panelVerticalBotones->addWidget(radio3);
     panelVerticalBotones->addStretch();
     mainLayout->addLayout(panelVerticalBotones,2,3);

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Please provide a minimal compilable example reproducing the problem.

sorry, i found it!! i was setting 2 elements on the same place :P