[Serusers] online/offline status and accounting

Hello, I'm a new user and I have questions.I have a problem about registration and online/offline status. 1. I open the SIPphone first, it log in and i can make a call (my status is online) several times. One hour later i check it but my status is still online and it's never be offline. 2. How can I control accounts, I use Serweb, but in admin when i press the "accounting" it doesn't work. And anybody can make calls using sipphone without loggin in (not registered in mysql but it can make a call), how? İf i use this, if (!proxy_authorize("", "subscriber")) { proxy_challenge("", "0"); break; }; Can i prevent calls from unregistered users ?