Connection refused error

I have a question for red5phne v0.0.03

I need change red5(RC2) rtmp port because firewall setting.

Registration is fine, but I got error when create audio connection.

[SocketConnector-0] ERROR org.red5.server.webapp.sip.RTMPUser - java.net.ConnectException: Connection refused

How to setting correlation config(red5.properties,red5-core.xml…or?).

Thanks for your read…