Configured Stun but NOT showed in SIP

I configured stun in rtp.conf and res_stun_monitor.conf

in the asterisk CLI>stun show status Hostname Port Period Retries Status ExternAddr ExternPort 3478 30 3 OK 186.7.x.x 41780

it display my external ip address properly

but when I run

[code]asterisk CLI> sip show settings
Network Settings:

SIP address remapping: Disabled
Externaddr: (null)
Externrefresh: 180

I don’t see the external address.
Why? What I have to do?