Where you able to figure this out? As I am trying to so the same thing and it is not working. Please let me know. Thank you.
I'm not sure if they figured out a solution, but i had a problem talking to an instrument where it worked in Hyperterminal but not in labview. Turns out that i had to write characters one at a time. This example helped me. Not sure if this is your problem but a little FYI either way.