Dial up means using the telephone line. When it says it doesn't see the carrier, it means it can't hear the dial tone before it starts calling. You won't plug into the 10/100. You need to plug into the telephone/modem port, but I don't think this one has that, you would have to use the USB 56k modem. But before you use the modem, you need to install software to use it, did you do so?