Puppet users - Jan 2014 - couldn't find the class from the console while Installing a module

Hello, I started learning Puppet Enterprise 3.1.1 by following its quick 
start guide. Now I am having trouble with adding new modules. I installed 
puppetlabs-ntp and puppetlabs-awsdemo_profiles in the master node. all 
modules including these two are under the /home/ubuntu/.puppet/modules. 
When I run 'puppet module list', I can see all of them. However, I
couldn't
find any of them when I clicked "add classes in the PE console. Any 
comments and helps? Thanks.

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