From: Kok Soon on
I've written a .net Framework 2.0 application in a 32 bit windows XP
environment to send/receive messages to/from a device connected via
the USB port (through RS232 to USB converter). It worked perfectly but
when I run the application on a 64 bit windows XP OS, the device does
not seems to response to the command message sent.

Any help is greatly appreciated.