You use the DF1 Full Duplex driver with the 1747-UIC. You have to set it for the DF1 parameters it uses; 19200 baud, CRC error checking, and "1770-KF3/1747-KE" device type.
Sometimes the hardest thing is figuring out which COM port the device has been assigned by Windows. Mine always shows up as COM5 (Windows 2000 SP4), but I have a customer who has it change around from COM4, 5, 6, and 7 whenever he reboots, so he has to go check the Windows Hardware Manager every time (Windows XP SP1).