Some helpful tips that solve most problems: Restart computer (this solves most problems for Windows Users). Hang-up modem and redial at a slower speed. If you have an external modem, ensure you DO have a high-speed uart. Check your modems initialization string. Download and install the latest drivers for your modem. If browsing the WWW, press the stop button, then the reload button. Check all of your settings in your TCP/IP software. (make sure they match the current IP Information.)