I have the same problem with this configuration:
Windows XP, MAX 2.2.0.3010, NI-Daq 6.9, LabView 6.1
and I still haven't found a solution but with a different configuration (Win ME,MAX 2.0.3.6, NI-DAQ 6.8, LabView 6.0) everithing works well! I'm still trying to understand where exactly the problem is.