Serial Modem Problem

Hi,
I have an rs-232 (serial) modem from creative (56k). Because I haven’t a serial port (rs-232) on my computer I bought a pci card with two serial ports (in the manul they mentioned as16550 UART serial DB9 com ports). I tried all possible methods to install the modem but nothing happened. My computer (win xp) does not recognise the modem to install the drivers. I forced the the installation from “Add new hardware” and I used even the original drivers or the standard 56k drivers". Nothing happened. When I query the modem then some leds open from a while and that is only…
Thanks

Buy a USB modem and get rid of the legacy hardware.