Cart Price Rule uses Configurable's Category instead of Simple's

Question

I want a cart price rule to only be active for certain simple products under a configurable product, but so far I've been unable to accomplish this. Any ideas?

One thing I've tried was to create a category to assign all simple products to, but Magento seems to only be checking the configurable product's category in this case.

Here's the rule:

-ACTIONS: Apply 20 percent of product price discount.

if ALL of these conditions are TRUE: Category is not one of 6, 12, 14, 27

I've tried adding an additional SKU condition ("is not one of...") with no success.

Answer 1

I ended up creating a second rule that applies the discount to specific SKU's belonging to the categories set as exempt in the first rule. Seems to work well.