I'm trying to install the awesome_nested_set plugin in a new project. From the project directory, I enter script/plugin install git://github.com/collectiveidea/awesome_nested_set.git . I keep getting the error message "Plugin not found..." I've tried this off and on all day thinking it might be a transient problem, but it's not going away. I can download the plugin directory from the site, so I don't think it's a server availability problem. Can anyone suggest what the problem might be or what I might do to start figuring it out, please?