Switching in-between game levels

Question

I'm having problems trying to invoke my setMap method in my game canvas class. It works fine when I use it in my tile layer class after removing the default case in the switch statement, but for some reason, it doesn't switch the level in my game's thread. Could it be that I have to call the garbage collector, then the method, or will I have to create a seperate array that merges my current map with the next level? I've searched and asked everywhere and found absolutely nothing.
package de.enough.polish.example;
import javax.microedition.lcdui.game.*;
import javax.microedition.lcdui.*;
public class TheLevels {
    private static final int [][] level1={
    {0,0,0,0,0,0,0,9,10,0,0,0,0,0,0,0,0,0},
    {6,6,6,6,6,6,6,7,8,5,5,5,5,5,5,5,5,5},
    {1,1,1,1,1,1,2,3,3,4,1,1,1,1,1,1,1,1}
    private static final int [][] level2={
    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
    {2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2}
    private int TILE_WIDTH=64;
    private int TILE_HEIGHT=64;
    private int TILE_NUM_ROW = 3;
    private int TILE_NUM_COL = 18;
    private int [][] currentLevel;
    private TiledLayer theBoard;
    private int screenHeight;
    private int bgColor;
    /** Creates a new instance of TheLevels */
    public TheLevels(int screenHeight) throws Exception {
        this.screenHeight = screenHeight;
        setMap(1);
    public void setMap(int level) throws Exception{
        Image tileImages = null;
        switch (level){
            case 1:  tileImages = Image.createImage("/street.png");
                      currentLevel = level1;
                      //groundColor = 0xF8DDBE;
                      break;
            case 2:  tileImages = Image.createImage("/grass.png");
                        currentLevel = level2;
            default: tileImages = Image.createImage("/street.png");
                      currentLevel = level1;
                      //groundColor = 0xF8DDBE;
                      break;
            theBoard = new TiledLayer(TILE_NUM_COL,TILE_NUM_ROW, tileImages, TILE_WIDTH, TILE_HEIGHT);
            for (int rows=0; rows<TILE_NUM_ROW; rows++) {
              for (int columns=0; columns<TILE_NUM_COL; columns++) {
                theBoard.setCell(columns,rows,currentLevel[rows][columns]);
        public TiledLayer getBackground(){
            return theBoard;
        public int getBackgroundColor() {
            return bgColor;
        public int getWidth(){
            return theBoard.getWidth();
        public int getHeight(){
            return theBoard.getHeight();
}

Answer 1

I would connect each device to a power source, and then reset them by holding the power button and the home button until they turn off.
If it keeps happening, I would put the devices in recovery mode and restore them with iTunes.
This article will help with that if needed:
iOS: Unable to update or restore
http://support.apple.com/kb/HT1808