Jenkins chef-plugin not working

I am trying to use this plugin http://ift.tt/1JeQywG

I have Jenkins running on tomcat7 in an AWS instance. I installed the plugin via the jenkins 'Manage plugins' UI.

But when I click on 'Run chef client on remote host', I get nothing. The fields that should pop up to allow me to put in details about my ssh-key and other details are not displayed.

Has anyone else experienced this? Are there any solutions?

Thank you in advance.