Plugin not found: ["git://github.com/collectiveidea/awesome_nested_set.git"]

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?

-- Mike

This is a known problem with Ruby 1.9. If that is what you are running see the following for a fix:

https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/2018

Thanks so much, Rick. I really appreciate your help.

-- Mike