[Serusers] PostgreSQL

Dear all, I am trying to use SER with PostgreSQL but in separate boxes, one for the proxy and the other one with the DB backend. A group of colleagues succeed in installing everything in the same box, but I am trying to go further, because the database is also part of a bigger database system application and We would like to gather everything together. Anyway I got an authorized 401 code when I try to log on in the SER system. I am trying to find out what is going on. I have downloaded the sip_scenario utility to analyse the tcpdump files generated with the ethernet utility. Anyway I still dont see what happens when the SER server tries to connect with the PostgreSQL database, the tcpdump tool says that there is any kind of connection but I dont know really what is going on. Can anyone give any hint to help me out? Many thanks in advance Miguel