I have a dell tower at home running Pent IV 800 with 768 ram. Win Xp Pro. Everytime i connect to a dialup it disconnects after about 30 seconds once i open up a browser and try to go to a website. I then reconnect and have no problems again untill next time. this has happend for 2 years. I have switched modems and reinstalled the operating system several times. (Fdisk).