Hide stock information

Hello,
I have tried to hide the stock information with the code mentioned in other discussion.
.hikashop_product_stock_count{ display:none; }
But so far no result.
I have placed in the configuration in dispay CSS. At the bottom. Am I doing something wrong?

Hello Nicolas,
Yes it works. Great.

Another small thing. Hope I can explain it to you.
I work with products in different sizes with stock.
But there are some products that when you select it says not on stock.
But when you have selected a size it says (at it should be) on stock.
Is this something I haven't set the way it should be?

Here I have an example
www.dodowear.nl/Didriksons-1913-Dames/pr...lma-kleur-zwart.html