Intalling ejabberd on AWS ec2

Trying to install ejabberd on ec2, tried many things but nothing seems to be working.

results of some commands

cat /etc/os-release:

VERSION="2015.03"
ID="amzn"
ID_LIKE="rhel fedora"
VERSION_ID="2015.03"
PRETTY_NAME="Amazon Linux AMI 2015.03"
ANSI_COLOR="0;33"
CPE_NAME="cpe:/o:amazon:linux:2015.03:ga"
HOME_URL="http://ift.tt/Ru6HnZ"

sudo yum install ejabberd:

Loaded plugins: priorities, update-motd, upgrade-helper
984 packages excluded due to repository priority protections
No package ejabberd available.
Error: Nothing to do

Is it possible to remove priority protections and whether it is a good idea or not?

Then how can I possibly install ejabberd using "yum install ejabberd" ?

I am new to linux Thanks