Dear Sir,
Thank you very much for using the NI Developer Zone.
The version 6.9.2 of NI-DAQ is the first NI-DAQ version that is officialy supported under Windows XP. As you are using NI-DAQ 6.9.1 I strongly suggest you to update to the latest version of NI-DAQ.
Best Regards.
Omar De Andrade
Applications Engineer - Computer Based Instruments
www.ni.com/support