How to disconnect jsmpp connection while using auto reconnect

[kalebtade]

I have developed an application using jsmpp library. I used the auto-reconnect class to make the application auto-connect
but when I try to use unbindAndClose() it sends null to #private SMPPSession session = null; ......so the system still do auto-reconnect how to forcefully unbind the system

JButton btnDisconnecct = new JButton("Disconnecct");
btnDisconnecct.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
session.unbindAndClose();
// execService.shutdown();
}
});
btnDisconnecct.setBounds(170, 26, 129, 25);
panel.add(btnDisconnecct);