Tiled/Sprite collision

[Games]

Hi,

I want to ask how to collide sprite with a tile in layer on map created in tiled.

So far I have this, but it doesnt work

/* global demo, game, Phaser */

demo.stateMaze = function(){};
var ball;
var playerSpeed = 3;
var map;

demo.stateMaze.prototype = {
  
    preload: function()
    {
        game.load.tilemap('map-maze', 'assets/maps/hole_in_a_park/maze/mapa.json', null, Phaser.Tilemap.TILED_JSON);
        game.load.image('tileset-maze', 'assets/maps/hole_in_a_park/maze/tileset.jpg');
        game.load.image('ball','assets/imgs/gula.png');
    },
    create: function()
    {
        game.stage.backgroundColor = '#FFFFFF';
        //Starting physics
        game.physics.startSystem(Phaser.Physics.ARCADE);
        
        map = game.add.tilemap('map-maze');
        map.addTilesetImage('tileset','tileset-maze');
        //CallBACK
        map.setTileIndexCallback(15, this.collisionHandler(), this);
        normal = map.createLayer('normal');
        normal.resizeWorld();
        wall = map.createLayer("wall");
        wall.resizeWorld();
        
        normal.renderSettings.enableScrollDelta = true;
        wall.renderSettings.enableScrollDelta = true;

        ball = game.add.sprite(0, 80, 'ball');
        ball.anchor.setTo(0.5, 0.5);
        //Enabling ball physics
        game.physics.enable(ball);

        game.scale.fullScreenScaleMode = Phaser.ScaleManager.EXACT_FIT;
       
        game.input.onDown.add(function(){
            if (game.scale.isFullScreen)
            {
                game.scale.stopFullScreen();
            }
            else
            {
                game.scale.startFullScreen(false);
            }
        });

    },
    update: function()
    {
        //Collide
        game.physics.arcade.collide(ball, wall);
        if(game.input.keyboard.isDown(Phaser.Keyboard.RIGHT)) 
        {
            ball.scale.setTo(1, 1);
            ball.x += playerSpeed;
        } 
        if (game.input.keyboard.isDown(Phaser.Keyboard.LEFT))
        {
           ball.scale.setTo(-1, 1);
           ball.x -= playerSpeed; 
        }
        if(game.input.keyboard.isDown(Phaser.Keyboard.UP))
        {
            ball.y -= playerSpeed;         
        }
        if (game.input.keyboard.isDown(Phaser.Keyboard.DOWN))
        {
             ball.y += playerSpeed;   
        }
    },
    collisionHandler: function()
    {
        console.log("COLLISION!!!");
    }
    
};

But it never write COLLISION!!! so can anyone tell me what to do ?

Quote

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         "y":0
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         "height":50,
         "name":"wall",
         "opacity":1,
         "type":"tilelayer",
         "visible":true,
         "width":50,
         "x":0,
         "y":0
        }],
 "nextobjectid":1,
 "orientation":"orthogonal",
 "renderorder":"right-down",
 "tiledversion":"1.0.3",
 "tileheight":16,
 "tilesets":[
        {
         "columns":28,
         "firstgid":1,
         "image":"tileset.jpg",
         "imageheight":16,
         "imagewidth":448,
         "margin":0,
         "name":"tileset",
         "spacing":0,
         "tilecount":28,
         "tileheight":16,
         "tilewidth":16
        }],
 "tilewidth":16,
 "type":"map",
 "version":1,
 "width":50
}

and this is my map is json. My ball sprite is 28x28 pixels.

How can I make them collide? I want when a ball collide with a tile in a wall layer to stop moving