Hi Jeff,
There may be a problem with the board, but more likely it is an incorrect interaction with your computer's BIOS and OS or an unreleased handle for the board in another application. The following KnowledgeBase lists several troubleshooting steps to solve the problem.
http://digital.ni.com/public.nsf/websearch/DCFCDB240788F8D486256D6A00834D80?OpenDocument
If the problem persists on this board and not for others then the board is likely bad and can be sent to National Instruments for repair.