If you have firewall running and it is ZoneAlarm, that is the problem. You have to either disable ZoneAlarm or switch to another firewall. Sygate personal firewall works allright and you can download it from CNET (download.com). NOTE: if you are using ZoneAlarm and want to uninstall it, visit its website for detailed uninstallation instructions. Don't just use add/remove program. Otherwise, you could crash your computer.