linux autfs question

I'm trying to setup autofs to mount the directory and not working, but  I have mounted manually and working fine. What am I doing wrong here?

[root@localhost etc]# mount -t nfs 192.168.0.175:/home/auto_home /home
[root@localhost etc]# cd  /home
[root@localhost home]# ls
ghuru


Auto mount setup:

[root@localhost etc]# cat  /etc/auto.master
/misc   /etc/auto.misc
/home   /etc/auto.home
/net    -hosts
+auto.master

[root@localhost etc]# cat  /etc/auto.home
storage         soft,timeo=30,rw        192.168.0.175:/home/auto_home

[root@localhost home]# cat  /etc/nsswitch.conf  |  grep  -i automount
automount:  files nisplus

[root@localhost ~]# /etc/init.d/autofs restart
Stopping automount:                                        [  OK  ]
Starting automount:                                        [  OK  ]
[root@localhost ~]# cd /home/storage
bash: cd: /home/storage: No such file or directory

thanks in advance.