Problem with collision groups ...

[festyrbg]

I'm trying to set collision groups for my objects and I'm failing miserably. My map consists of tiles and ramps which i want to place in different collision groups, but something strange happens which i dont understand. When i set collisionGroup on either the ramps or the tiles i get collisions on the other one and if i set collision groups on both, my player collides with neither.  Please somebody explain what im doing wrong, thanks!

 

 

 

        map = game.add.tilemap('map');      
        map.addTilesetImage('grass-tileset', 'grassTiles');        
                     
        layer = map.createLayer('world1');       
        layer.resizeWorld();       
  
        map.setCollisionBetween(33,38);
        map.setCollisionBetween(49,54);
        map.setCollisionBetween(65,70); 
     
        var tileObjects = this.game.physics.p2.convertTilemap(map, layer);  
        var rampObjects = this.game.physics.p2.convertCollisionObjects(map, "ramps"); // add ramps form Tiled

        this.playerCollisionGroup 	= this.physics.p2.createCollisionGroup();
        this.tilesCollisionGroup  	= this.physics.p2.createCollisionGroup();
        this.otherCollisionGroup 	= this.physics.p2.createCollisionGroup();
        this.rampCollisionGroup 	= this.physics.p2.createCollisionGroup();

        for(var i = 0; i < rampObjects.length; i++) {
        	var rampObject = rampObjects[i];
        	rampObject.setCollisionGroup(this.rampCollisionGroup);
        	rampObject.collides([this.playerCollisionGroup]); 
        }

        for(var i = 0; i < tileObjects.length; i++) {    	
        	var tileBody = tileObjects[i];
        	tileBody.setCollisionGroup(this.tilesCollisionGroup);
        	tileBody.collides([this.playerCollisionGroup]); 
        }

        player = this.game.add.sprite(50, 50, 'playerSprite');
        player.anchor.setTo(0.5, 0.5);
        player.scale.setTo(0.5, 0.5);    
  		this.game.physics.p2.enable(player);
        this.game.physics.p2.gravity.y = 100; 
        player.body.setCollisionGroup(this.playerCollisionGroup);
       	player.body.collides([this.tilesCollisionGroup, this.rampCollisionGroup]);
        player.body.setCircle(20);  
        player.body.addCapsule(22,10,0,0,0);   
        player.body.fixedRotation = true; 
        player.body.data.gravityScale = this.gravityScale;