Are you in Windows? Is so, what version of Windows do you have? If you have XP do the following: If in Windows, go to control panel, network connections, open it and right click on properties, bring up your local connection, that will tell you if you have your Windows firewall enabled or disabled, if enabled, disable it while downloading then turn it back on after your exit Limewire. If you're not in windows then you will have to provide a little more detail about your system and the type of firewall you are running. Also check your Limewire connection & make sure you are connected to the internet and to Limewire while downloading. Its very easy to lose connections when on your desktop unless you got an always on connection. Hope this helps?