Category Image

For the category archive page I have 2 things

1) an image for the category

the images for all my categories are in a singple directory on my website, and each image is named after the category name (nicename).

So, on archive.php, i call the category image with :

<?php
foreach((get_the_category()) as $category) {
    echo '<img src="http://mydomain.com/images/category/' . $category->category_nicename . '.jpg" />
';
}
?>

I also have category descriptions for each category, which are shown in the archive.php

I call the description with :
<?php echo category_description( $category ); ?>

problem is, description won’t show up when the image calling code is enabled. But as soon as i remove the category image code, the description shows up in the archive.php

any fix ?