You don't have the correct drivers. Use the orgianl disk or CD that came with the modem, or download the drivers from 3Coms site. IIR, they have a way to find the ...
Compatible with the PCI Local Bus Specifications Revision 2.2, the Apollo 4022P multiport serial controller operates in either a 3.3 or 5V signaling environment; however, it works only in a PCI slot ...