ok seems to work.. I only have another problem, i have a multilanguage shop.
Case:
Default language is dutch. Everything shows in dutch ( that's good) when selecting english ( as customer) the page where you are at that moment displays in english and all the links to other parts of the shop are also english.
But, when clicking a link to an other part of the shop the language switches back to ( default) dutch again.
So i think the variable which containts the languagesetting is not available on other pages or something..