Minimize and Restore Midlet

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JavaSE

J2ME

Eclipse

Hello Sir
I am new with J2ME and eclipseIDE I have completed my Mobile Application approximately
but now I face a problem I have to connect it first and when exit I minimized it and messaging is continuous now I wish to receive these messages and When I restore it then All updates is taken by it during restoring but in this it display an java.IO.lang error I have tagged code with this pl help me in this because this is the only part is remaining in my application
the code is given below

public void startApp() {
           String connectList[];
           // Was the MIDlet started by an incoming connection?
           connectList = PushRegistry.listConnections(true);

           if (connectList == null || connectList.length == 0){

              try{
                    _display = Display.getInstance();
                    ImplementationFactory.setInstance(new MyImplementationFactory());
                    VKBImplementationFactory.init();
                    Display.init(this);
                     try{
                           incomingConnection = (MessageConnection) Connector.open(ConnectionString);
                           this.incomingConnection.setMessageListener(this);
                       }catch(Exception e){
                                 Dialog.show("SMS Exception","IO Exception!"+e.toString(),"OK", null);
                       }
                       setDefaultImage();
                       screens.main_Screen();
                       screens.mainMenu.show();
               }catch(Exception ex){
                   Dialog.show("Application Error","Low Memory, Minimum requirement is 800 kb "+ex.getMessage(),"Ok", null);
               }
           } else{  // Started from an incoming connection
               _display = Display.getInstance();
                ImplementationFactory.setInstance(new MyImplementationFactory());
                VKBImplementationFactory.init();
                       Display.init(this);
                       _display.showNotify();
                       _display.restoreMinimizedApplication();
                       add_Push_Registry(); //  Do implement the SMS received interface


           }
  }

///////////this is for minimizing and exit

public void close_App(){
            System.gc();                    //Close the application
//         destroyApp(true);
//         notifyDestroyed();
       _display.minimizeApplication();  //Minimize the application
    }

/////////this is for setting push registry for restoring ////////

private void add_Push_Registry()    {
       try{                                                  //Register with PushResigtry

         String MIDletRegistered = PushRegistry.getMIDlet(ConnectionString);
         incomingConnection = (MessageConnection) Connector.open(ConnectionString);
         this.incomingConnection.setMessageListener(this);

         if(MIDletRegistered == null){
               Dialog.show("IS Zigbee MIDlet Registered","NULL","OK", null);
               PushRegistry.registerConnection(ConnectionString, GetMIDletClassName(), "*");
         }else{
               if(!MIDletRegistered.equals(GetMIDletClassName()))
                       Dialog.show("Midlet listen","Port for receiving SMS is already occupied by some other application",
                               "OK", null);
        }
      }catch(Exception e){
                 Dialog.show("EX","IO Exception!"+e.toString(),"OK", null);
      }
   }

thanks
Om Parkash J2ME developer