Phaser bmd collision?

[The_dude8080]

Hello. I created a wall bmd that is colliding with a movable square bmd. The collision is detected by the getPixel method that checks for pixel color properties. However even when both bmd are far from each other and the square is in the same y coordinates as the square bmd they collide. However when they are distant from each other and the square is not "contained" in the same y coordinates (height) of the wall they do not collide. Any idea?

the_wall_bmd = game.add.bitmapData(game_width, game_height);
the_wall_bmd.ctx.beginPath();
the_wall_bmd.ctx.rect(0, 200, 100, 200);
the_wall_bmd.ctx.fillStyle = '#FFA07A';
the_wall_bmd.ctx.fill();
the_wall_bmd.update(); 
the_wall = game.add.sprite(0,0,the_wall_bmd, 0,wall_group);