Masi,
Have you taken a look at this KnowledgeBase article?
http://digital.ni.com/public.nsf/allkb/FEF778AD990D5BD886256DD700770103
The article relates to LabVIEW programming, but I would try a few of these steps with the CVI equivalents and see if that solves your problem.
Michael L.
Sales Engineer
National Instruments