display error, png with transparent background

[flash77]

Dear community,

I display a paddle and a ball in a breakout game.

I've got an error concerning the display of the paddle.

Both pictures (ball + paddle) have got a transparent background.

The ball is displayed correctely - the paddle not (it has a white rectangle as background).

Online I read that I have to you use "convert_alpha()" to display pictures with a transparent background...

I attached ball.png and paddle.png.
In addition to that I attached the wrong display.

Would you please have a look at these files and perhaps tell me what's wrong with paddle.png?

def create_image(file, color=None):
    """
    Create image from a file.  If color is specified, replace all FOREGROUND
    pixels with color pixels.  Modify image so TRANSPARENT colored pixels are
    transparent.
    """
    if color:
        # Recolor the image
        image = Image.open(file).convert("RGB")
        for xy in product(range(image.width), range(image.height)):
            if image.getpixel(xy) == FOREGROUND:
                image.putpixel(xy, color)
        image = pygame.image.fromstring(image.tobytes(), image.size, "RGB")
    else:
        image = pygame.image.load(file)
    image.set_colorkey(TRANSPARENT)
    return image.convert_alpha()