Hi, All:

My SER is located on two different PC. One is Registrar and RADIUS, DNS server , MySQL. the other is Proxy server only. All started successfully and run well. After a while, I registered the fourth user. Now I can call the previously registered three users with latest registered user.But failed the other direction. When I call the newly registered user with first registered user. the SER report "404 Not Found".

What happens to the Registrar and Usrloc modules? I guess the problem lies in that two modules. Am I right??

Thanks for your instructions and help! Best Regards.

Sun Zongjun.