Duo Auth Proxy is not listneing on any port number

hi , i have installed Duo Auth Proxy and while installing windows client i have checked proxy server option and give my DUO AUTH proxy IP and PORT number 389.

But i got an error says that connection with the server coulnot be established.

i logged into AUTH proxy server and done Telnet localhost 389 but that port number is not listning .

please help. thanks in advance.