Icecon linux interface

Hello, I got my server running on Ubuntu Server and I found out that Icecon can be used to access the interactive CLI remotely. I did the following:
chmod +x icecon_linux_amd64
./icecon_linux_amd64 <server_ip>:<port> <mypasswd>

And the output is this:

IceCon - Icedream's RCON Client
	© 2016 Carl Kittelberger/Icedream

When I use the --command version, I get the same thing and nothing happens with the server.
./icecon_linux_amd64 --command="quit" <server_ip>:<port> <mypasswd>

Is icecon supposed to mirror the cfx interactive CLI? I just don’t understand how is Icecon supposed to behave. Thank you!