Your settings seems normal.
Today I have installed the driver (Installation CD V1.03) under Windows XP.
Is was mapped to COM7 and I have no problems to connect to EC4. In CoDeSys communication parameters dialog I've selected "Serial(RS232)" with 38400, no parity, 1 stop and flow control off.
Did you follow the installation hints?
- 1st the driver
- then plug in the cable
- 2nd the brigde (comes twice!!!)