I have tried by adding
as suggested, but without success.
Maybe I did not put it at the right place in the files.
In the meantime I had already installed the most recent eCommerce bundle, i.e. "VirtueMart_1.1.2_eCommerce_Bundle_Joomla_1.5.6" in a new folder "www.borduurwinkeltje.be/r
". Everything worked fine until, I think, I selected 'Tigra Tree' as 'Category display type' in mod_product_categories. If I select Tigra Tree or JSCook it results in 'Operation aborted'. With Link List, dTree and TransMenu, no error. And it doesn't make a difference what module I use to display the product categories: mod_product_categories or mod_virtuemart, with Tigra Tree or JSCook selected, it does not work, otherwise it works fine.