[SR-Users] using avpops for querying an external db on kamailio 3.0.2

Hi, I have recently installed a kamailio server with release 3.0.2. I would like to use the kamilio as a redirect server that would recieve REGISTER messages from users and query a proprietary database that holds users information - if the users are registered to the service it would redirect the user to the registrar. I need it for security reasons which I can't fully explain. Now, I am using the avpops module. I have been able to make it work using the following configuration: modparam("avpops","db_url","mysql://user:pass@localhost/mysql") modparam("avpops","avp_table","proptable") modparam("avpops","db_scheme","scheme0:username_col=sipUsername;value_col=sipDomainName;table=proptable") ----------         if (is_method("REGISTER"))         {                 if (avp_db_load("$fu/username","$avp(s:CONSTANT_DOMAIN)/$scheme0"))                 {                         append_branch("sip:registrarIP");                         sl_send_reply("302","Test Redirect");                 }                 else                 {                         sl_send_reply("404","Test Not found");                 } -------------- The thing is that I don't need to match the string CENTREX against the domain- it is something I added because I couldn't find another way to do it. I would like to match only the username. I tried wildcards or leaving it empty but it didn't work. I tried not to use the scheme and instead use the table it self but again it didn't work. Is it possible? Do you know a better to do it? Thanks, Yaron.