Checkbox that doesnt show its value

hi folks,
i've got a JTabel with a column filled with Jcheckboxes. i've assigned a self-made renderer to this column:
public class myCheckrenderer extends JCheckBox implements TableCellRenderer
public myCheckrenderer() { super(); }
public Component getTableCellRendererComponent(
JTable table, Object color,
boolean isSelected, boolean hasFocus,
int row, int column) {return this;}
myCheckrenderer TCellRenderer2=new myCheckrenderer();
TableColumn1.setCellRenderer(TCellRenderer2);
in this case, the checkbox doesn't show when the user clicks on it.
when i remove the "TableColumn1.setCellRenderer(TCellRenderer2);" - line, it shows the change.
Whats the matter?

the problem is,
that the checkboxes react on clicks - i can readout the boolean - values of it and they are correct - only the view is not correct.
by saying that i should use the default renderer for boolean values - didn't i do this by assigning a boolean - value to the data-model?

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