I'm working on an old Joomla version 1.5.26 site that has VirtueMart version 1.1.4 and MetaMod v2.12. The problem involves the VirtueMart pagination. The site currently resides on a private WAMP server on my own computer.

There was a discussion about this issue a few years ago on this forum. See
Virtuemart pagination causing Metamod modules to disappear. Unfortunately the solution was not published. Stephen wrote only, "Mark got it working."

I have two MetaMod modules that in turn display two Custom HTML modules only on the product_details pages of product categories as determined by the settings in the MetaMod Menu Assignment panel.

The form of the PHP code in the MetaMod module is simply:

$vm = JomGenius("virtuemart");

if ($vm->check("pagetype not = shop.browse")

and $vm->check("pagetype = shop.product_details"))

return XXX;

where XXX is the unique ID number of the module to be displayed. If site visitors are browsing a category page, the module will not be displayed. If visitors go to a page displaying product details, the correct module displays as expected. If the visitor then goes to the Previous Product or the Next Product using the VirtueMart pagination, the wrong module is displayed in some cases.

If the Menu Assignment for Metamod Module A is Menu Item A, the product detail pages directly linked from the category A page and the other product detail pages reached through the VirtueMart pagination will correctly display Custom HTML module A.

If the Menu Assignment for Metamod Module B is Menu Item B, the product detail pages directly linked from the category B page will display Custom HTML module B. The product detail pages reached through the VirtueMart pagination from the B category products will incorrectly display Custom HTML module A. If I disable Metamod Module A only, no module is displayed on the category B products reached through the VirtueMart pagination links.

I thought of using the category ID but the MetaMod debugger shows JRequest::getVar('category_id') == NULL for the pages reached through the VirtueMart pagination.

Is there a solution to correct this problem?