FreePBX with a Public IP

I have my asterisk with freepbx in internet.

I install Asterisk Sip Settings and i made a sip extension.

I already did the autoconfigure but i cannot conect with my softphone.

I follow the steps here:
http://www.freepbx.org/support/documentation/howtos/howto-setup-a-remote-sip-extension

When i have only asterisk i can connect, but now i install freepbx i can’t.

“Tools” > “Asterisk SIP settings”

if you are under a NAT:

set “NAT” to Yes
set “IP Configuration” to you public Static IP
set “Local Networks” to your LAN IP range (eg. 192.168.1.0/255.255.255.0)

or if you have a static address on the Asterisk server (without a NAT):

set “NAT” to No
set “IP Configuration” to your public Static IP
set “Local Networks” to your public Static IP (eg. 62.18.1.210/255.255.255.255)