One problem may be that few of us on this forum are familiar with the hardware. Why not try posting in the
High-Speed Digitizers forum?
Really, someone at NI should have replied to your post by now, as it is their policy to address all unanswered support questions themselves. They have the ability to route your question to scope specialists internally, so it shouldn't matter where you post. Maybe this one fell through the cracks, in which case you'll just have to keep yelling, or maybe--though you shouldn't have to--repost.
--John