GUI won't appear?

This LocalScript already knows what "currentversion" is. I've already got the GUI formatted correctly and everything in the GUI is in the correct place. However, my "Update" or "New" screen isn't appearing. It was working fine until yesterday when I got that RBLX Studio update. I don't know if that update caused something to break. I can't find anything wrong with it.

    sp=script.Parent

    local plr=game.Players.LocalPlayer
    local plrgui=plr:WaitForChild("PlayerGui")
    local GUI=sp:WaitForChild("gui_Version")
    local Version=plr:WaitForChild("Version")

    local update=GUI.Update
    local new=GUI.New

        if Version.Value~=currentversion and Version.Value~="0" then
            update.Visible=true
            update.Briefer.Text=updatedesc.Value
            update.Exit.VerNum.Text="Ver "..currentversion.Value.." "
        elseif Version.Value~=currentversion and Version.Value=="0" then
            new.Visible=true
            new.Introductory.Text=Introductory
        end

If someone could help me find what's wrong with the script, I'd greatly appreciate it. Thank you!