[rabbitmq-discuss] Rabbit fails to start on EC2 Ubuntu 11.04

[Gnep]

Hi,

I followed the manual http://www.rabbitmq.com/ec2.html to setup rabbit
on Ubuntu 11.04. Everything goes fine, except when I tried to start
rabbit server:

root at rabiit# rabbitmq-server
Activating RabbitMQ plugins ...
0 plugins activated:

node with name "rabbit" already running on "rabbit"
diagnostics:
- nodes and their ports on rabbit: [{rabbit,38878},
                                    {rabbitmqprelaunch2039,33005}]
- current node: rabbitmqprelaunch2039 at rabbit
- current node home dir: /var/lib/rabbitmq
- current node cookie hash: gItMUWlpJAhfs9LBB1uCEg==

I'm new to rabbit, could somebody shed some light on this?

Thanks,
Gnep