Wiebe,
I opened the Netherlands e-mail support (where your request would have gone), and they do not have the autoresponse turned on, so any request that you make through www.ni.com/support or www.ni.com/ask will not confirm that you submitted. I will contact the branch office and request that they turn this feature on. Thank you for reporting this behavior, and please post back if you have any questions or further comments. Thanks.
Daniel McChane
Web Support Operations
National Instruments