PCI Simple Communications Controller Driver

My computer is a Dimension 2400.  I recently got it out of storage, and tried to set up the internet through dial-up.  It wouldn't set up because it said there was no modem on my computer.  I know for a fact that there at least used to be, because I used it for dial-up previously.  So... I checked the Device Manager, no modem.  So on the advice of a friend, I took out the card that I plug the phone line into, and moved it up a notch to force the computer to recognize the new hardware.  It recognized it, and went to install the driver, but there is no driver software for a PCI Simple Communications Controller on my computer.  Does anyone know where I can find it?