[ubuntu] Can't get any Unity Lenses to work

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http://ubuntuforums.org – I'm new to Ubuntu and am interested in getting some different lenses but no matter what lens I try (Rotten Tomatoes, calculator, cities scope, etc) I can't get any of them to work. I copy and past the exact code I need into the terminal and it runs the command but then at the end I get this message: Code: E: Unable to locate package unity-lens-utilities E: Unable to locate package unity-scope-rottentomatoes This is what happened after trying Rotten Tomatoes using this code: Code: sudo add-apt-repository ppa:scopes-packagers/ppa  sudo apt-get update && sudo apt-get -y (Hardware)