Of course I can connect to web via network port in my laptop but I can not do it via dial up port. Also I have a dual pci card supporting the two way connection (dial up and ethernet) of OSITECH company. Here the only ethernet connection do work properly but the other port related dial up connection built on the card (PCI). Newly because of non-working my dial up way on card, I have purchased an external USB " U.S.Robotics" Fax-modem, but once connecting via dialup I receive an error conflicting port. please help me.

How can I install the modem U.S.Roborics USR9001. My IBM Think Pad R51e and my CLC – BT232425dc doesn’t recognize it. I use the right driver and it still say that there’s is no modem connect to the computer, Help me !!!
But i’m vietnamese, i live in vietnam , and in my country, there’s no u.s.robotics, me friend buy the modem for me, ( that’s bad