Change in bind_ip value is not reflecting

I have mongo installed on Centos instance in AWS and I am connecting to the mongoDB server from my system. To connect from remote system we need to change bind_ip value to 0.0.0.0 in /etc/mongod.conf file and have done the same thing. Still I am not able to connect to the mongoDB from my system. When I checked weather the changed bind_ip is reflecting or not using netstat -a command the result is tcp 0 0 localhost:27017 0.0.0.0:* LISTEN but, to connect from remote system it should be tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN So the change in bind_ip value is not reflecting. Can anyone help on this?