I thought is had something to do with de virtuemart settings instead of them altering a file.

Because of the pricing, i'm reluctant to update virtuemart. Maybe if they read this post, they can reply also.

Hello,

some of the problems were caused by the fact the online service URL has changed.

There is an updated version available at our site for download.
Or simply update the URL in:
administrator/components/com_virtuemart/classes/euvatcheck.class.php
from
ec.europa.eu/taxation_customs/vies/servi...checkVatService.wsdl
to
ec.europa.eu/taxation_customs/vies/checkVatService.wsdl

I finally had the guts to update Joomla AND Virtuemart.
Also changed the URL, so the site is up to date!

Seems not to be solvable, thus the module doesn't work.