Problem install phptheadmin on amazon ec2

I googled on how to install phpmyadmin on ec2, and i got this syntax:

sudo yum install phpmyadmin

But i keep getting this:

Loaded plugins: fastestmirror, priorities, security
Loading mirror speeds from cached hostfile
amzn-main                                                | 2.1 kB     00:00     
amzn-updates                                             | 2.1 kB     00:00     
Setting up Install Process
No package phpmyadmin available.
Error: Nothing to do

I tried to go my website, its not installed. Please help

EDIT:

My Server OS: Amazon Linux AMI 64 bit

I tried: yum install phpmyadmin –enablerepo=development, but still I got this error:

Loaded plugins: fastestmirror, priorities, security

Error getting repository data for development, repository not found