UNABLE TO OPEN MODEN UNDER WIN2000

I JUST INSTALL WIN2000 PROFESSIONAL ON MY SYSTEM, THE PROBLEM I HAVE IS MY MODEM, SYSTEM UNABLE TO RECONIZED MODEM (US-ROBOTIC FAX INTERNAL 56K). I TRY EVERYTHING LIKE UNISTALL, RESTALL, ALSO DID SAME THING FOR DRIVER) NEED HELP, I HIT AGAINST A WALL, PLEASE HELP!!! THANKS