my_table.setRowSelectionAllowed(true) funktioniert nicht;

[CConraths]

Hallo Forum,
ich habe folgende Problematik.
scheinbar ist "setCellSelectionEnabled(true)" und "setRowSelectionAllowed(true)" nicht wirksam, wenn man die ScrollPane an die JOptionPane per showMessageDialog übergibt.

Hat da jemand eine Idee ?
Vielen Dank fürs helfen
Christian

                my_table.setCellSelectionEnabled(true);
                my_table.setRowSelectionAllowed(true);
                CellColorDecorator.install(my_table);
                my_table.setAutoCreateRowSorter(true);
                my_table.setPreferredScrollableViewportSize(new Dimension(my_table.getPreferredSize()));
                // neue ScrollPane
                my_scroll_pane = new JScrollPane(my_table);
                my_scroll_pane.setLayout(new ScrollPaneLayout());
                my_scroll_pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
                my_scroll_pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
                my_grid_bag_constraints = new GridBagConstraints();
                my_grid_bag_constraints.gridx = 1;
                my_grid_bag_constraints.gridy = 0;
                my_grid_bag_constraints.gridwidth = 0;
                my_grid_bag_constraints.gridheight = 0;
                my_grid_bag_constraints.insets = new Insets(2, 2, 2, 2);
                my_grid_bag_constraints.fill = GridBagConstraints.BOTH;
                einsatzverfuegungen_detail_panel.add(my_scroll_pane, my_grid_bag_constraints);
                JOptionPane.showMessageDialog(my_frame, einsatzverfuegungen_detail_panel, "Erhebungen",
                        JOptionPane.INFORMATION_MESSAGE);