PCI Modem

I have Linux Mandrake installed, but I cannot get it to detect my PCI modem on com 3. I have the installCD for the modem but it doesn’t have drivers on it for Linux. The modem is Volcano SoftK56 Data Fax Voice Speakerphone CARP PCI.
I have tried searching the net for a driver with no success yet. Does anyone know a specific place where I can get a driver for it to run in Linux?