Hey PowerBill,
I would like to answer your question, but I would need more information about your specific system. When posting a question, make sure you give adequate information about your problem or system. I am assuming that you are talking about National Instruments license agreement and not how to add one to a project. In addition, our license agreement policy differs, so I would need to know your programming interface, what drivers you are using, and what is your target OS.
Here is a knowledgebase that explains this in more detail.
http://digital.ni.com/public.nsf/websearch/0B985D55B73CF1038625655A005F680A?OpenDocument
I hope this helps out.