如何在Postgres中使用phpPgAdmin

我已经在Centos 6.4 64位上安装了Postgres 8.4.我想用yun安装的phpPgAdmin-5.0.4-1来管理Postgres数据库(比如MySQL和phpMyadmmin)安装phpPgAdmin-5.0.4-1之后我无法通过访问192.168.7.4/phpPgAdmin/(192.168.7.4)登录到phpPgAdmin是我的Centos服务器),它总是说"登录失败",虽然我确定我输入用户名(postgres)和密码正确这是我的信息,希望你能帮忙:

netstat -tupln | grep postmaster
tcp        0      0 0.0.0.0:5432                0.0.0.0:*                   LISTEN      771/postmaster
tcp        0      0 :::5432                     :::*                        LISTEN      771/postmaster

/etc/phpPgAdmin/config.inc.php
$conf['servers'][0]['desc'] = 'PostgreSQL';
$conf['servers'][0]['host'] = '192.168.7.4';
$conf['extra_login_security'] = false;

/var/lib/pgsql/data/postgresql.conf
listen_addresses = '*'

/var/lib/pgsql/data/pg_hba.conf
local   all         all                               ident
# IPv4 local connections:
host    all         all         127.0.0.1/32          ident
# IPv6 local connections:
host    all         all         ::1/128               ident

提前致谢.