The answer to your question is best answered by one of our online web support resources, the KnowledgeBase. If you go to:
http://www.ni.com/
and click on 'KnowledgeBase', you will be taken to a page where you can do searches for information on issues such as these.
Do a search for 1ESCEL0O, which is the document ID of a KnowledgeBase entry on this issue.
Also, in the future, you will get faster response times to your Developer Exchange postings if you classify them in the correct category. DSA has its own category, as do general purpose Data Acquisition (DAQ) questions. The LabVIEW category is usually for purely LabVIEW programming questions that don't involve any hardware aspect.