I installed PhpPgAdmin in CentOS. Every time select an object (database, table, schema,..) PhpPgAdmin asks me to enter my login and password.
Left side menu (Servers->PostgreSQL) not connected.
System
- CentOS 5
 - PHP Version 5.1.6
 - PostgreSQL8.3.11
 
thank you,
G. Padmanabhan.
                        
Your problem sounds like the session is lost. Possible problem sources: