Displaying a subcategory filtered by the manufacturer

I know the following URL displays all products from a certain manufacturer.

http://MyDomain.com/index.php?main_page=index&manufacturers_id=12

I am trying to display all products under a subcategory by a particular manufacturer.

I tried the following and it doesn't work.

http://MyDomain.com/index.php?main_page=index&cPath=9_15&manufacturers_id=12

Is this possible to query the above? How is it done?

The way that works in Zen Cart is to use:
filter_id

for the manufacturers_id when there is a cPath set ...

So if you were looking at cPath 3_10 and wanted to filter manufacturers_id 4 you would have:
/index.php?main_page=index&cPath=3_10&filter_id=4

If you were looking at manufacturers_id 4 and wanted to filter categories_id 10 you would have:
/index.php?main_page=index&manufacturers_id=4&filter_id=10

Thanks for the reply

Ajeh:

The way that works in Zen Cart is to use:
filter_id

for the manufacturers_id when there is a cPath set ...

So if you were looking at cPath 3_10 and wanted to filter manufacturers_id 4 you would have:
/index.php?main_page=index&cPath=3_10&filter_id=4

If you were looking at manufacturers_id 4 and wanted to filter categories_id 10 you would have:
/index.php?main_page=index&manufacturers_id=4&filter_id=10

The above somehow doesn't work for me!

when I place /index.php?main_page=index&cPath=3_10&filter_id=4, it displays all products under category 3 and sub-category 10, without filtering for manufacturer_id 4.

also
when I place /index.php?main_page=index&manufacturers_id=4&filter_id=3_10, it displays all products for manufacture_id 3.

The cart is using Dynamic Filter. Could that be causing this?

For this one:

when I place /index.php?main_page=index&cPath=3_10&filter_id=4, it displays all products under category 3 and sub-category 10, without filtering for manufacturer_id 4.

I cannot reproduce a problem as I get 3 Products from categories_id 10 (which is cPath 3_10) and the manufacturers_id 4 ...

If you check in your Admin for DVD ... Action ... do you have the master_categories_id on:
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Speed 2: Cruise Control
Speed Linked

each set to the master_categories_id for Action?

For manufacturers_id 4 and subcategories categories_id 10 (from 3_10) this one:
when I place /index.php?main_page=index&manufacturers_id=4&filter_id=3_10, it displays all products for manufacture_id 3.

has to be:
/index.php?main_page=index&manufacturers_id=4&filter_id=10

You probably are not seeing the listing but rather the centerboxes ...