Facebox leads to wrong page and not adding to cart

[chrlar]

We have a module "Virtuemart products" on our front page (Module Description Displays: Featured, Best Sales, Random, or Latests products) with featured products.

Suddenly it stopped working, that is, the products are displayed, but as you buy them, they are not added to the shopping cart (the text in the shopping cart module is only enlarged).
Although the facebox says the product had been added. An the text "continue to shop" now has a wrong link. It now leads me to www.kollevold.no/component/virtuemart/, which is not where is it supposed to go.

From the menu links to the products, we can add to cart normally.

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