Thank you Axel Mendoza. But I don't understand how to authorize the access to the PostgreSQL server form the odoo server ip address. Here the pg_hba config entries in my postgreSQL installation. # TYPE DATABASE USER ADDRESS METHOD @remove-line-for-nolocal@# "local" is for Unix domain socket connections only @remove-line-for-nolocal@local all all @authmethodlocal@ # IPv4 local connections: host all all 127.0.0.1/32 @authmethodhost@ # IPv6 local connections: host all all ::1/128 @authmethodhost@ # Allow replication connections from localhost, by a user with the # replication privilege. @remove-line-for-nolocal@#local replication @default_username@ @authmethodlocal@ #host replication @default_username@ 127.0.0.1/32 @authmethodhost@ #host replication @default_username@ ::1/128 @authmethodhost@

Add a line like this:

# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
host    all             all             odoo_ip_address/32         md5

I am using localhost for load odoo for browser. Is it correct if I add odoo_ip_address as 0.0.0.0 ?

I am using localhost for load odoo for browser. Is it correct if I add odoo_ip_address as 0.0.0.0 ?

No, it's not correct. In that line you need to authorize the access from a subnet range of ip addresses, so if you specify a direct ip address you use /32, for a big range you need to do it like:
#take this subnet ip address: 192.168.1.143
192.168.1.143/32
192.168.1.0/24
192.168.0.0/16
192.0.0.0/8
0.0.0.0/0
#not sure about this

I mean that I'm not sure about 0.0.0.0/0
Did you solve it your problem?

Yes I solved the problem. The problem was in the openerp-config file. In there data dir should be like this--> data_dir = C:\Users\admin\AppData\Local\OpenERP S.A.\Odoo. But previously it was like this--?data_dir = C:\Users\admin_2\AppData\Local\OpenERP S.A.\Odoo. Thank you Axel Mendoza.

If your problem was solved you need to vote for the answer so it may help to others