[Users] How to use pdt module correctly?

Hi all, I try to rewrite 444111(a)aaa.com to 111(a)bbb.com with pdt module. ############# pdt table in DB ################## mysql> select * from pdt; +----+----------------------+----------+--------------+ | id | sdomain | prefix | domain | +----+----------------------+----------+--------------+ | 1 | bbb.com | 444 | bbb.com | +----+----------------------+----------+--------------+ ############## parts of my openser.cfg ##################################3 loadmodule "pdt.so" modparam("pdt", "db_url", "mysql://openser:openserrw@localhost/openser") modparam("pdt", "db_table", "pdt") modparam("pdt", "domain_column", "sdomain") modparam("pdt", "prefix_column", "prefix") modparam("pdt", "prefix", "") modparam("pdt", "hsize_2pow", 4) modparam("pdt", "sync_time", 300) modparam("pdt", "clean_time", 600) route[0] { ........................(skip) if (is_method("INVITE")) { xlog("L_INFO", "Prefix To Domain I - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n"); prefix2domain("0","0"); xlog("L_INFO", "Prefix To Domain II - M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n"); }; ........................(skip) } #################### /var/log/message ####################################### May 23 15:55:12 localhost openser[22172]: New request - M=INVITE RURI= sip:444111@aaa.com F=sip:222@aaa.com T=sip:444111@aaa.com IP=60.244.xxx.xxx ID=88BEB1DB-B447-4DAF-A3D6-212DBA3EC628(a)10.6.1.185 May 23 15:55:12 localhost openser[22172]: Prefix To Domain I - M=INVITE RURI=sip:444111@aaa.com F=sip:222@aaa.com T=sip:444111@aaa.com IP= 60.244.xxx.xxx ID=88BEB1DB-B447-4DAF-A3D6-212DBA3EC628(a)10.6.1.185 May 23 15:55:12 localhost openser[22172]: PDT:prefix2domain: no prefix found in [444111] May 23 15:55:12 localhost openser[22172]: Prefix To Domain II - M=INVITE RURI=sip:444111@aaa.com F=sip:222@aaa.com T=sip:444111@aaa.com IP= 60.244.xxx.xxx ID=88BEB1DB-B447-4DAF-A3D6-212DBA3EC628(a)10.6.1.185 -- Best Regards Charles