Node.js SDK 'Operation timed out' error

Hello Tug,

I am trying to follow the following method to change the host name from 127.0.0.1 to the IP of EC2 instance.
http://www.couchbase.com/docs/couchbase-manual-1.8/couchbase-bestpractice-cloud-ip.html

However, I can’t restart my server.
Error: Failed to restart the server.

So I try the following method, and I still can’t restart my server.
http://www.couchbase.com/docs/couchbase-manual-1.8/couchbase-troubleshooting-common-errors.html

Any new suggestions for the ‘Operation timed out’ error? My test app run successfully talking to the local couchbase server and talking to the remote (ec2) couchbase server from OpsWorks. It is just failed talking to the remote (ec2) couchbase server on my local machine.

PS: I use couchbase v2.2.0 and Linux v12.04 on a virtual machine.

Thanks!