Check the Use a proxy to access the Internet checkbox if you go online through a proxy.
Fill the boxes with the appropriate values. For example: if your proxy is http://proxy.aol.com:8080 then in the Proxy server box enter http://proxy.aol.com and in the Port box enter 8080
Beginner tip: Don't forget the http:// at the start of the proxy server.
Enter your username into the Proxy username box and enter your password into the Proxy password box.
Power user tip: Proxy login and password fields are not secure, as they will be saved to the configuration file.