[Users] Problem with RPID

I use radius authorize reply to set AVP rpid value: 0(30405) DEBUG:auth_radius:radius_authorize_sterman: Success 0(30405) DEBUG:auth_radius:generate_avps: getting SIP AVPs from avpair 225 0(30405) DEBUG:auth_radius:extract_avp: string is <rpid:9284444> 0(30405) DEBUG:auth_radius:extract_avp: AVP name is <rpid> 0(30405) DEBUG:auth_radius:extract_avp: AVP val is <9284444> 0(30405) DEBUG:auth_radius:generate_avps: AVP 'rpid'/0='9284444'/0 has been added But when this caller is invating, openser writes to log: 0(30405) append_rpid_hf: No rpid AVP The question is: where are SIP-AVPs stored? Do I have to load auth_db in openser.cfg? Or avps could be stored in RAM without mysql database?