Onboard modem in 2350 doesn't work

I can't get my computer to recognise that I have a modem,  I think this is because it's not a seperate modem but part of the motherboard and therefore i can;t just pick a standard windows modem and try and make that work. I've looked through the downloads but cant find any drivers or anything that could make it work.

I formatted my computer a few weeks ago but never tried connecting to the internet before so i don't know whether it worked before and it's something to do with the format. I don't have much installed on the computer yet so if someone thinks it might help and it's a last resort I will reformat but I don't really want to to be honest.

Oh...btw...I'm running Win XP...I do have fedora core linux on the comp as well but I don't think I can get the web on that to work either...only tried quickly though because the main things I want the web for are on Windows.

If anyone can help I'll be very appreciative!