A thousand thanks to you, Scott, yes, that's the problem.
Here but I have one complaint to you: we are using the NI PXIs and working on several projects, sometimes, we can not implement latest NI software because of the risk of updating. However, if there's any "big bug fixuture", we will be very glad to update. So my suggestion is: please let us know fixed bugs explanations when there's an updated version.
Again thanks to excellent NI sevice, also the best sevice in the world I think.
Jacky