Fixing a Modem that won't Dial. There are several possible reasons for your modem problem. As usual, the simplest answers are also the most common. If you have just moved your computer or set up the computer for the first time, you may have a simple problem.
Modems have two places to put telephone connections.
The other socket on the modem is for a handset so that you can share your computer line with a regular phone. When setting up your computer, you may have inserted the phone line in the wrong socket. Correct the problem and try again. Secondly, make sure that the line to which the computer is connected is working. There might be a phone line problem.