I installed the DynamicPriceUpdater_multilangual files, and it appeared to be working. I am quite inexperienced with Zen-Cart so I might have done something wrong. I am using Zen Cart v1.3.8a/v1.3.8.

What happens is that I get a blank page when I click the "add this to my cart" on the product page. The product is added to the Shopping Cart, but to get there I have to click the link in the side box