[Serusers] Radius Accounting Help

Hi, I've configured my radius + mysql and openser. Now openser is sending accounting packet to radius server and I'm able to see accounting packets coming to my radius server but the problem is : Its sending the Acct-Status-Type = Start Service-Type = Sip-Session Sip-Response-Code = 200 Sip-Method = Ack packet twice and then it shows rlm_radutmp: Login entry for NAS august port 5060 duplicate and then two stop packet: Acct-Status-Type = Stop Service-Type = Sip-Session Sip-Response-Code = 200 Sip-Method = Bye and then it shows rlm_sql (sql) in sql_accounting: stop packet with zero session length and after second stop packet it shows rlm_radutmp: Logout for NAS august port 5060, but no Login record please help. thanks arun