SEF wrong after continue shopping link

[pierregulpen]

I noticed that if a shopper is looking around in the shop all links are looking nice. BUT when somebody puts something in the cart and then clicks continue shoppping the link does NOT go to the nice link but to the NON SEF link from Virtuemart....

instead of goiing to :

/webshop-spaanse-producten/spaanse-wijn       it goes to

/component/virtuemart/index.php?option=com_virtuemart&view=category&virtuemart_category_id=20&Itemid=137...

not looking nice..... any ideas where to start searching this ?

I have the latest VM 3 and Joomla