[Users] Not able to access avp variables in reply route

Hello, I'm trying to implement custom CDR using OpenSER. What I do is, insert a record in cdr table on invite request. I get the id of the inserted row using LAST_INSERT_ID() function of mysql in avp_db_query and store in avp variable rowid. I set connect time in reply route when I receive 200 OK for Invite request. When I get 200 OK for BYE request, I update the cdr record and store connect time, disconnect time, duration, etc. But at this place(reply route) I get the null rowid so as connect time. According to tm module's onreply_avp_mode parameter, I should be able to see the values set from request route in reply route if I set that parameter to 1 but it has no effect. I can not use either avp variables or script variables as transaction variables to record custom cdr. Can anyone guide me implementing this scenario or tell me what I've done wrong? -- Regards Ruchir Brahmbhatt Ecosmob Technologies