USB - only for power 5V. serial port - data

(12-July-2009 10:26)
I connecting the USB cable AND the serial cable.
Input card on my reader
1 red and 1 green - ok
My PC have 1 serial port (/dev/ttyS0, but I tried use in my config ttyS1,ttyS2,ttyS3)
windows - ok
Linux - output error " [ Loader ] Reset failed ..."

ATR - that this?
that can be not so in linux in contrast with windows os?