final Display display = gMainTab.getDisplay();
check_button.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
IpCheckerWizard wizard = new IpCheckerWizard();
wizard.setIpSetterCallBack(new IpSetterCallBack() {
public void setIp(final String ip) {
if(display == null || display.isDisposed())
return;
display.asyncExec(new AERunnable(){
public void runSupport() {