problem with canvas.UP , DOWN, LEFT and RIGHT J2ME

Question

i have case when i want do action in different time.
when i press LEFT and RIGHT i want do void keyPress, but when i press UP and DOWN i want do laser.scrollup or scrolldown.

i added boolean navigatorEnd

navigatorEnd = false

if i press up and down
action == Canvas.FIRE
end
if (navigatorEnd = true)
keyPressed()
end

but the problem is after i keyPress canvas.LEFT or Right, keypress doesn't work. and only execute action == Canvas.FIRE

please help me

public void dealKey(int keyCode){
  if(keyCode==0) return;
  int action = 0;

  try{
    action = getGameAction(keyCode);
  }catch(Exception e){
    e.printStackTrace();
  }

  if(keyCode == Canvas.KEY_NUM2 || action == Canvas.UP){
    NavigatorEnd =true;
    laser.scrollUp();
  }else if(keyCode == Canvas.KEY_NUM8 || action == Canvas.DOWN){
    NavigatorEnd =true;
    laser.scrollDown();
  }else if(keyCode == Canvas.KEY_NUM4 || action == Canvas.LEFT){
    NavigatorEnd =false;
    if (index == 0) {
      index = 5;
    } else {
      index = index - 1;
    }
  }else if(keyCode == Canvas.KEY_NUM6 || action == Canvas.RIGHT){
    NavigatorEnd =false;
    if (index == 5) {
      index = 0;
    } else {
      index = index + 1;
    }
  }else if(keyCode == Canvas.KEY_NUM5 || action == Canvas.FIRE){
    if(NavigatorEnd =true){
      laser.dealHotSpot();
    }
  }
}
int keyCode;
public void keyReleased(int keyCode) {
  this.keyCode = 0;
}
public void keyPressed(int keyCode) {
  this.keyCode = keyCode;
  String block2;
  if (NavigatorEnd == false) {
    switch (getNavigatorAction(keyCode)) {
    // aksi untuk tombol tengah / center selection (CENTER)----------------------------------
    case FIRE:
      if (symbols[index] == ""){
        symbols[index] = playerSymbol;
        if(winnerExist(symbols).equals("")){
          boolean flag = false;
          for(int i=0; i<symbols.length; i++){
            if(symbols[i].equals("")){
              flag = true;
            }
          }
          if(flag==true){
            switch(computerLevel){
            case 0:
              Random rnd0 = new Random();
              int tmpX0=0;
              for(;;){
                //tmpX0 = rnd0.nextInt(8);
                if(symbols[tmpX0].equals("")){
                  symbols[tmpX0]=computerSymbol;
                  midlet.display.setCurrent(form);
                  break;
                }
              }
              break;
            case 1:
              String res1 = winningChance();
              if(!res1.equals("")){
                symbols[Integer.parseInt(res1)] = computerSymbol;
              }else{
                Random rnd1 = new Random();
                int tmpX1=0;
                for(;;){
                  //tmpX1=rnd1.nextInt(8);
                  if(symbols[tmpX1].equals("")){
                   symbols[tmpX1]=computerSymbol;
                   break;
                  }
                }
              }
              break;
            case 2:
              block2 = blockChance();
              if(!block2.equals("")){
                symbols[Integer.parseInt(block2)] = computerSymbol;
              }else{
                String res2 = winningChance();
                if(!res2.equals("")){
                  symbols[Integer.parseInt(res2)] = computerSymbol;
                }else{
                  Random rnd2 = new Random();
                  int tmpX2=0;
                  for(;;){
                 // tmpX2=rnd2.nextInt(8);
                    if (symbols[tmpX2].equals("")){
                      symbols[tmpX2]=computerSymbol;
                      break;
                    }
                  }
                }
              }
              break;
              case 3:
                if(symbols[4].equals("")){
                  symbols[4] = computerSymbol;
                  computerLevel=2;
                  break;
                }else{
                  Random rnd2 = new Random();
                  int tmpX2=0;
                  for(;;){
                   // tmpX2=rnd2.nextInt(8);
                    if (symbols[tmpX2].equals("")){
                      symbols[tmpX2]=computerSymbol;
                      computerLevel=2;
                      break;
                    }
                  }
                }
                break;
              case 4:
                if(symbols[4].equals("")){
                  symbols[4] = computerSymbol;
                  computerLevel=2;
                  break;
                }else if(symbols[0].equals("")){
                  symbols[0]=computerSymbol;
                  break;
                }else if(symbols[2].equals("")){
                  symbols[2]=computerSymbol;
                  break;
                }else if(symbols[6].equals("")){
                  symbols[6]=computerSymbol;
                  break;
                }else if(symbols[8].equals("")){
                  symbols[8]=computerSymbol;
                  break;
                }else{
                  Random rnd2 = new Random();
                  int tmpX2=0;
                  for(;;){
                    //  tmpX2=rnd2.nextInt(4);
                    if (symbols[sudut[tmpX2-1]].equals("")){
                      symbols[sudut[tmpX2-1]]=computerSymbol;
                      computerLevel=2;
                      break;
                    }
                  }
                }
                break;
              default:
                break;
            }
          }
        }
      }
      break;
    //case UP:
    //  browser.scrollUp();
    //  break;
    // aksi untuk tombol ke bawah (DOWN_ARROW)-----------------------------------------------
    //  case DOWN:
        // aksinya di sini
    //    if (index >= 6) {
    //      index = index - 6;
    //    } else {
    //      index = index + 3;
    //    }
    //    break;
    // aksi untuk tombol ke kiri (LEFT_ARROW)------------------------------------------------
    case LEFT:
      // aksinya di sini
      if (index == 0) {
        index = 8;
      } else {
        index = index - 1;
      }
      break;
    // aksi untuk tombol ke kanan (RIGHT_ARROW)----------------------------------------------
    case RIGHT:
      // aksinya di sini
      if (index == 8) {
        index = 0;
      } else {
        index = index + 1;
      }
      break;
    default:
      break;
    }
    repaint();
  }
  // aksi untuk tombol right selection (RIGHT_SOFTKEY)-----------------------------------------
  if (keyCode == -6) {
    // aksinya di sini
  //  midlet.exitMIDlet();  // keluar dari MIDlet
  }
  // aksi untuk tombol left selection (LEFT_SOFTKEY)-------------------------------------------
  if (keyCode == -5)
  {
    // aksinya di sini
  }
  repaint();
}