First, be sure you're using the correct cable. PanelView serial ports use a straight-through serial cable, while connections to an SLC-5/0x port use a null-modem cable. If you are using a cable like the 1747-CP3, add a null-modem adapter.
Some USB/RS232 adapters don't work well with the Autoconfigure feature.
To configure the driver manually, leave all the settings at default (19200, 8/N/1, Full Duplex) and set Error Checking to CRC, and set Device Type to the category that includes PanelViews (I think that's the same as SLC/MicroLogix).