I don't like it when people play with the UI. This will confuse the user and they will think the application is broken if they can't click on the check box.
Anyway, remove the MouseListener from the check box.
MouseListener[] ml = (MouseListener[])checkBox.getListeners(MouseListener.class);
for (int i = 0; i < ml.length; i++)
checkBox.removeMouseListener( ml[i] );