Looks like you guys got the LabVIEW version issue settled. I think what you might have meant is that you are using NI-DAQ 7.2, which would make a lot more sense.
The driver versions that you are using will be what determines whether or not your setup will work on Windows XP. The best thing to do is to go to the drivers and update page on ni.com located
here, locate the drivers you are using, and determine whether or not they work in Windows XP.