I don't know the software, but usually, all you have to do really is go to
Tools>Options>Connection Settings>Manual Proxy Configuration
Set set up the IPs from there. Most of those software proxies usually have you connect to 127.0.0.1 (localhost) and to a particular port (8080 in most cases).
Try it with IE. If the proxy settings work, then they also should with FireFox... unless the Proxy itself can't find the Internet connection going out... (happened to me once
)
Tools>Options>Connection Settings>Manual Proxy Configuration
Set set up the IPs from there. Most of those software proxies usually have you connect to 127.0.0.1 (localhost) and to a particular port (8080 in most cases).
Try it with IE. If the proxy settings work, then they also should with FireFox... unless the Proxy itself can't find the Internet connection going out... (happened to me once