Problem with asterisk A@H registration on sip server

Hello. I installed A@H and I’m able to call external numbers and internal but it isn’t yet possible to be called. I found in the shell " Got SIP response 479 “Please don’t use private IP addresses” back from XXXXXXXXX"
What does it means?
How can I configure the sistem to register itself on Sip server and to redirect to internal softpone the calls?