Mule on Amazon Cloud

Mule on Amazon Cloud

I installed Mule Community Server on AWS cloud and it is functioning
properly. When I use http end point and invoke Mule services from browser
on my Amazon EC2 machine they work. When I access them from outside, the
request timeout. The end points are not bound to local host but mapped to
0.0.0.0:8081. I have checked all firewall settings using amaozon security
group and set permission for all. Yet it doesnt work. I am able to access
the Windows IIS http server on the same machine but not mule on port 8081.
Any clues would help.