Hello,
I believe that what you are seeing is a known issue with one of our drivers. I just want to verify some information. What version of NI-PAL are using? The easiest way to check is to go into MAX and under Software check the properties of NI-PAL. When you get that information, I would like you do create a support request so that we can discuss this further. You can create an e-mail request at:
www.ni.com/ask
Regards,
AndrewM
Applications Engineer
National Instruments