Help with Main Image Border Wrapping around ImgLink Image

[limelites]

I've replaced the "enlarge image" text with a button.gif and it looks much better.... however, does anyone know how I stop the border from the main image wrapping itself around the button.gif I've created underneath the main product image?

I've searched Developers Tool Kit and I can't see where this image is actually Defined? I can see that additional_images.php and tpl_modules_main_product_image.php refer to a <span class="imgLink"> and a <span class="imgLinkAdditional"> so I've tried inserting all these in my stylesheet.css..... all seem to have no effect...... any help greatley appreciated :-)

#imgLinkAdditional {
border: 0px solid #ffffff;
}

#imgLinkImages {
border: 0px solid #ffffff;
}

#imgLinkAdditionalImages {
border: 0px solid #ffffff;
}

#imgLink {
border: 0px solid #ffffff;
}