Problem to connect to PostgreSQL7.2.3 using UNIXODBC's datamanager

Hi,

I have encountered a problem when I tried to use UnixODBC to connect to PostgreSQL7.2.3

Here are my ini files:
*********************************************************
[postgres(at)sv-ns postgres]$ cat /etc/odbc.ini
[postgre_test]
Description = postgresql
Driver = postgresql
Trace = No
TraceFile =
Database = testing
Servername = sv-ns
UserName =
Password =
Port = 5432
Protocol = 6.4
ReadOnly = No
RowVersioning = No
ShowSystemTables = No
ShowOidColumn = No
FakeOidIndex = No
ConnSettings =
************************************************************
[postgres(at)sv-ns postgres]$ cat /etc/odbcinst.ini
[postgresql]
Description = Driver for postgresql
Driver = /usr/local/pgsql/lib/libodbcpsql.so
Setup = /usr/lib/libodbcpsqlS.so
FileUsage = 1
CPTimeout =
CPReuse =
************************************************************
When I run DBManager, it says that:
"Could not connect to the server; could not connect to the remote socket."

The postgresql is running, I am able to browse and issue SQL statements on
the database using psql. Did I miss sth here?

Thanks in advance!

Lingjia