Problemas con Postgres

[MonicaH]

Pero a mi me corren perfectamente las funciones PSQL:

[0] => pg_connect
[1] => pg_pconnect
[2] => pg_close
[3] => pg_connection_status
[4] => pg_connection_busy
[5] => pg_connection_reset
[6] => pg_host
[7] => pg_dbname
[8] => pg_port
[9] => pg_tty
[10] => pg_options
[11] => pg_ping
[12] => pg_query
[13] => pg_send_query
[14] => pg_cancel_query
[15] => pg_fetch_result
[16] => pg_fetch_row
[17] => pg_fetch_assoc
[18] => pg_fetch_array
[19] => pg_fetch_objec

Etc...

Y me sale este error:

Connection refused Is the server running on host localhost and accepting TCP/IP connections on port 5432?Que hacer?