Image Handler 4 (for v1.5.x) Support Thread

[mc12345678]

Hey there,
having some issues in the admin being able to enable/disable products from category page, I have read throuhg all of the posts i can find, ensured that the code in category_product_listing.php were correct:

if ($products->fields['products_status'] == '1') {
        echo zen_draw_form('setflag_products', FILENAME_CATEGORIES, 'action=setflag&pID=' . $products->fields['products_id'] . '&cPath=' . $cPath . (isset($_GET['page']) ? '&page=' . $_GET['page'] : '') . ((isset($_GET['search']) && !empty($_GET['search'])) ? '&search=' . $_GET['search'] : ''));?>
        <input type="image" src="<?php echo DIR_WS_IMAGES ?>icon_green_on.gif" title="<?php echo IMAGE_ICON_STATUS_ON; ?>" />
        <input type="hidden" name="flag" value="0" />
        </form>
<?php
      } else {
        echo zen_draw_form('setflag_products', FILENAME_CATEGORIES, 'action=setflag&pID=' . $products->fields['products_id'] . '&cPath=' . $cPath . (isset($_GET['page']) ? '&page=' . $_GET['page'] : '') . ((isset($_GET['search']) && !empty($_GET['search'])) ? '&search=' . $_GET['search'] : ''));?>
        <input type="image" src="<?php echo DIR_WS_IMAGES ?>icon_red_on.gif" title="<?php echo IMAGE_ICON_STATUS_OFF; ?>"/>
        <input type="hidden" name="flag" value="1" />
        </form>

and categories.php:

if ( isset($_GET['flag']) && ($_GET['flag'] == '0') || ($_GET['flag'] == '1') ) {
        if (isset($_GET['pID'])) {
          zen_set_product_status($_GET['pID'], $_GET['flag']);
        }
      }

and still cant turn them on or off, checked for error logs, none, check for console errors, none.

Anything im missing here?
ZC 1.51
IMH 4

Realize you said ZC1.5.1, but that is reminiscent of ZC1.5 and not necessarily related to IH4. When did this begin happening? Upgrade?