Programming Forums - midlet-j2me

I'm using Netbeans IDE 5.5 with mobility pack and I'm making a midlet application.

I have a main form with an "ok" button returning to itself.
I have added on form, an imageItem1 on which i haven't put any default image. ( image = none)
i have added an image item(image1)

As you can see, I'm trying to add the image1 on imageItem1 when the flag boolean is true and dissapear it if not.. It just doesn't work..no errors:

 if (displayable == helloForm) {

             if (command == exitCommand) {

                           // Insert pre-action code here

                 exitMIDlet();

                          // Insert post-action code here

           } else if (command == okCommand1) {

                         // Insert pre-action code here



                getDisplay().setCurrent(get_helloForm());

                       // Insert post-action code here  



                     if(flag == true){

                      imageItem1.setImage(image1);

                      flag = false;

                     }

                     else{

                       imageItem1.setImage(null);

                       flag = true;

                     }              

            }

        }

It doesnt work even without the "if" process.. leaving only the:

imageItem1.setImage(image1);

any solutions?