Could it be that your baud rate setting in the LabVIEW program is set four times too fast? (clues: you get about 4x too much data and most of it is in clusters of 4 equal bytes).
Check your communication settings and maybe try different speeds. Remember that Hyperterminal has a problem changing baud rates, e.g. if you change the baud rate in hyperterminal, they won't take efect until you disconnect/reconnect so you might actually not communicate at the rate you think you are. Also make sure that the serial speed is actually wired to the "Visa configure serial port", maybe the wire is missing.
