[Users] problem with usrloc db-only mode

Hi all, A simple question about the db-only mode of usrloc (dbmode 3) I've two proxy configured with db_mode 3 the second proxy it's unable to do lookup on the db, there are no error in the debug log but it send reply "404 not found" to the first proxy. I've noticed that when i do lookup("location") on the second proxy it clean the location table and even if the table is filled with the correct contact it reply with 404. sometimes delete all contacts and sometimes contacts remain but failed lookup. what i'm doing wrong? In first proxy i'm running openser-1.1.0 and in the second the latest openser snapshot. the modparam of usrloc on the two proxy are like: modparam("usrloc|domain","db_url","mysql://SQL_USERNAME:SQL_PASSWORD@SQL_HOST/SQL_DB") modparam("usrloc", "db_mode", 3) modparam("usrloc", "matching_mode", 1) thank you, :tele