Hi, I'm having trouble placing a module on both a category page and a product page by category in my virtuemart installation.

I'm using the following code:

$vm = JomGenius("virtuemart");
if ($vm and $vm->check("pagetype = shop.product_details, shop.browse") ) {
  $category_id = $vm->info( "category_id" );
  if ($category_id == "1") return 35; /* module 35 for category 1 */
  if ($category_id == "2") return 37; /* module 37 for category 2 */

  return 39;
}

What's happening is, the module is displaying perfectly on the category page, but on the product page, I'm getting the following error:

Warning: Invalid argument supplied for foreach() in /home/..../modules/mod_metamod/mod_metamod/jomgenius/virtuemart.php on line 840

Any idea what I'm doing wrong?

thanks!
Eli