Display Current Category Image in Custom Menu

[Enzo]

I've modified the code to read as follows:

$result .=  str_repeat($this->spacer_string, $this->spacer_multiplier * 1) .  '<a href="' . zen_href_link(FILENAME_DEFAULT, 'cPath=' .  $category_link) . '">';                

$result .=  zen_image(DIR_WS_IMAGES . $categories->fields['categories_image'],  $categories->fields['categories_name'], SUBCATEGORY_IMAGE_WIDTH,  SUBCATEGORY_IMAGE_HEIGHT) . '<br />' .  $categories->fields['categories_name'] . '</a>'; 

However, the result is as follows:

<li><a href="http://localhost/test/index.php?main_page=index&cPath=1"><img width="100" height="80" alt="" src="images/no_picture.gif"><br></a></li>

I'm not sure why it does not acquire the correct path for the category image in SRC or why the ALT and the category's title are left blank as categories_name is omitted entirely.

Any ideas?