I have recently re-installed Win XP Pro. However my internal modem is not being detected on the control panel. I have tried inserting the CD that came with the modem but this does not work. I went onto the website for the modem (Conexuant?), downloaded a program to list the model inside, and am now about to load a generic driver. However, I have a choice of 2 drivers- one is a PCI, the other a USB. Which one should I use?