Why doesn't my camera shake? Works on Solo!

It works fine in Solo mode but when I try and play it normaly it will not work? Any help? My script is a normal script. Thanks! :) Credit will be given at my game :)

function shake()
    local camera = game.Workspace.CurrentCamera
    for i = 1,10 do 
        wait()
        camera.CoordinateFrame = camera.CoordinateFrame * CFrame.new(0,2,0)
        wait()
        camera.CoordinateFrame = camera.CoordinateFrame * CFrame.new(0,-2,0)
    end 
end 

while true do 
    wait(0.01)
    shake()
end