I recently installed a new modem to my XP operating system computer. After installation, I am having problems getting a "dial tone" when trying to reach my ISP. I did the diagnostic test on the modem and found the modem was installed correctly. I re-installed the modem software and the ISP software, but I'm still getting the no dial tone message. I also checked the phone/line connection for proper connection. My new modem says its on "Comm Port - 3 " and still have the old modem on "comm port 1". Do I need to remove the old modem completely in order to get the new one to work? Before I installed the new modem and the old modem went bad, all systems worked fine. Do I need to do the Hyperterminal test on the modem if the diagnostic test came back saying the modem is working?