I have an ELOTouch monitor without a driver for the touch screen, Series ET1947-XXWA-1. Any ideas?

I have a ELO touch monitor. I downloaded a driver from ELO's archive files bnut not sure if this is what I need to get the touch feature to work. I'm plugged in to my mac mini via dvi, I also am plugged into the serial port of the display through a serial to usb adapter to my mac mini. What am I doing wrong?