Pgbouncer cannot connect to server

I have pgbouncer installation and setup on windows. The pgbouncer service is running, but when I connect it to postgres 9.6 it throws an error "

pgbouncer cannot connect to server

" create a server with pgbouncer port

pgbouncer configurations are:
postgres = host=127.0.0.1 port=4851
staging29-6-1016 = host=localhost port=4851 dbname=staging29-6-1016
listen_addr = *
listen_port = 6432
auth_type = md5
auth_file = C:\Program Files (x86)\PgBouncer\etc\userlist.txt

      

        
        
        
      

    

userlist.txt also contains md5 encrypted password

Postgresql.conf file contains:

listen_addresses = '*' port = 4851

kindly help me how to remove this error.

2017-08-03 15:23:33.429 2360 LOG C-00EA8FE0: postgres/postgres@[::1]:54985 login attempt: db=postgres user=postgres tls=no 
2017-08-03 15:23:33.429 2360 LOG C-00EA8FE0: postgres/postgres@[::1]:54985 closing because: pgbouncer cannot connect to server (age=0) 
2017-08-03 15:23:33.430 2360 WARNING C-00EA8FE0: postgres/postgres@[::1]:54985 Pooler Error: pgbouncer cannot connect to server