I've run the ELM Scan adapter on my 97 2.3 and have had good luck with it. It should just install a general usb-serial driver and set a COM port. Have you verified that the COM port # in the obd software matches the port # in Windows device manager? I'll try to look also and see if I can remember if the baud settings had to be changed.
HA, just saw the age of this zombie thread, apparently revived by the spam account, my bad