Problem disabling prices category not working

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.5
-- Browser(s) name and version -- : FF 36.0a2

I have Two categories with child categories with products in the product-category. There are two menu-items for each category and the have both a module not published to show the product-layout. On one of the menu items/category I want to not show the prices. I thought is was as simple as disabling the price switch of the product parameters from particular menu module. The switch has no effect. The only thin that has effect is setting the default parameters, but that disables all the prices... Switching the prices on for the other category also doesn't work.

Is this a bug or am I doing something wrong?

Hello,
If you are using product listings from different content modules you'll just have to control the displaying of the price by using your product listing content module options.
Can you give me a link to the page where you are having your issue so that I can directly test it, and also show me more information about your issue through some screenshots ?

As you can see in the screenshots, i did set differtent values for the prices. Unfortunately they stay visible. I added a screenshot of the both the menu an corresponding modules. I also added screenshots of the website. The menu-item both are linked to different categories.

The link to the pages:
www.ledverlichting-lammers.nl/hikashop/p...rmatuur-60x60-40watt
www.ledverlichting-lammers.nl/hikashop/w.../led-paneel-30x30-cm

I hope you can point me in the right direction to fix it!

Thank you for the information!
The 0 price works like a charm, but we needed more. I've managed to make an override for the products that don't need a price. Also added an extra info form with Articles Anywhere from NoNumber. Our client can now select the product override in the product settings so the visitor gets a form instead of the price