Unreliable has put up a great page for HCF Modems. Double Click the 'System Icon', in control panel. Click the Device Manager TAB, on the System Properties Window. Double click the 'Rockwell HCF 56K Data Fax PCI Modem' line. Remove the check to 'Use automatic settings' box.
Press apply and yes to the warning window.
Restart the computer. This will assign either COM 3 or COM 5 to the modem. Perform Steps 1 to 6, making sure that the box for 'Use automatic settings', is still unchecked. Change the Basic Configuration from 0001 back to 0000 or vice versa. Press apply and yes to warning window.