How do I unblock a port on an amazon ec2 server while the virtual machine is running

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http://serverfault.com – I'm trying to set up a headless torrent server on my amazon ec2 server. I have also added port 9091 to the list of enabled ports but can't access it over the internet. This is the url for my server. I can access this if I use links2. My server is a 32bit ubuntu 12.04 virtual machine. I tried to check if ufw was in use but the status for that is inactive. How can I unblock the port and access it remotely? (HowTos)