Hello Jey,
Thanks for bringing this issue to the forums. I'd like you to answer a few questions to pin-point the problem.
1. Can you use the onboard serial port on your computer? (not the PCI 8431/2)
2. Can you further describe your setup? Any external hardware? Are you using LV?
3. What version of Measurement and Automation Explorer do you have? What version of LV?
4. Is there a praticular reason you are using a Windows 2000 OS?
Thank you,
Vimal Fernandez
ELP Engineer
Applications Engineering
Applications Engineer
National Instruments