Hi nsroc,
The problem may have been that the NI Device Loader service was not running, which would be fixed by reinstalling the driver, but can also be fixed more easily with the instructions in this KnowledgeBase article:
NI Device Loader (nidevldu) and NI Configuration Manager Services Not Starting
http://digital.ni.com/public.nsf/allkb/0819391CA91B3EB38625731D00024649?OpenDocument
Also, if you want to get the newest version of DAQmx at the time of this post, it can be found here for free:
NI-DAQmx 8.7.1 - Windows 2000/Vista x64/Vista x86/XP
http://joule.ni.com/nidu/cds/view/p/id/965/lang/en
Glad to hear things are working again!
Regards,
John Bongaarts