Cedrus Response Boxes

Is there anyone who uses the Cedres RBx30 Response devices with inquisit? How to read responses from USB? Anyone got a little code to help me on my way? the help on the Inputdevice doesn't mention USB anywhere. Thanks in advance

I've found already to read from the com2 port setting, but I still need to know what values I should read out. I need my valid responses that is. And how to set correctresponses for instance. Thanks in advance

I've found a little more information already, although it is not getting me any further. It is the RB 730 I use. I've done the following: - Installed drivers from the Cedrus support web site - Set the COM3 port it was originally assigned to to the COM2 port - Set the switches at the back of the USB RB730 device to: 1 down, 2 up, 3 up, 4 down - Tried to test which responses to use in the Tools menu in Inquisit, but alas, there wasn't any response received :( What can I do to make this work? Anyone a suggestion?