Border around vertical layout with panels

Hi All,

In my Application I am creating three panels and I am placing it in verticalLayouOut.

only problem is I don't see border around individual panel.

I tried to set

oPanel1.setAreaDesign(sap.ui.commons.enums.AreaDesign.Plain);

oPanel1.setBorderDesign(sap.ui.commons.enums.BorderDesign.Box);

any idea on this?

regards