[Plugin: Category Meta plugin] Doesn't Call Anything From DB

Hi, I really need this plugin to show and orginise category images. I tried this plugin on both WP 3.0 & WP 3.1. Everything goes fine in admin panel but when it comes to show meta on category page,

if (function_exists('get_terms_meta'))
{
    $metaValue = get_terms_meta($category_id, $meta_key);
}

code shows nothing. When i try to change this code like;

global $wp_query;
$cat = $wp_query->get_queried_object();
$category_id = $cat->term_id;

if (function_exists('get_terms_meta')) {
    $my_decription_value = get_terms_meta($category_id, 'my_description');
    echo $my_decription_value;
}

shows just “Array” text.

So can anyone help me about this issue?