[pjsip] Help me!

[ljmscsq]

I have downloaded the pjproject and built the source with VC++6.0 successfully.Now I want to test pjsua 
project.but I am facing some problems.
  1.I test it in one LAN. I build sip server on my computer,its IP is 192.168.1.1. I run A client in 
192.168.1.1 and B Client in 192.168.1.2.Two clients can be registered to server successfully.I can see the 
register information in sip server admintool.But two clients can't call each other.when I use A  to call B,I 
use command m,make call  sip:192.168.1.2 ,it doesn't show errors but nothing happens on B.What's wrong with 
it?
  2.My sip server is listening 5060 port .when I change this port,I can't register successfully.I want to know how to change default port in pj source for register.

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