Addon GRID wont work

So i downloaded some addons today and also got myself addon called GRID. its as close as it gets to Cataclysm default raid interface and thats why i like it. But for some reason it does not appear on my screen. I installed it correctly. it appears in my character menu addons panel. but when i load a character theres nothing. i tried using commands like "/grid, /grid show, /grid open" but nothing happens. i only get " type /help for list of commands" Does anyone have any solutions?