couldn't find the class from the console while Installing a module

[arguscesus .]

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.