When testing this, my client and I discovered that the product options disappeared once the add to cart button was pressed.
To fix this, edit /include/func/func.ajax.php:
Around line 105,
After:
PHP Code:
$product = array_shift($products);
Insert:
PHP Code:
if ('Y' == $product['is_product_options']) {
$product['options'] = func_get_product_classes($product['productid']);
}
Before: