Hi. Psiphon is designed to circumvent censorship on the Internet. I can't endorse or support your specific use case.
Generally speaking, if you are having trouble connecting to Psiphon through an upstream proxy on your network, you should test basic connectivity and functionality of the proxy using other tools first. You could use telnet to establish a connection to the proxy to make sure you have basic connectivity. You could also configure your web browser to use the proxy to make sure it functions normally as an http proxy.