My gui is not visible in game when told to be visible. What do I do?

local code = script.Parent.Parent.Code
local Pass = script.Parent.Parent.Pass
local Admin = game.StarterGui.ScreenGui.Admin



script.Parent.MouseButton1Click:Connect(function()
    if Pass.text == code.Value then
        script.Parent.Text = 'Correct'
        wait(2)
        script.Parent.Parent.Visible = false
        Admin.Visible = true
        Admin.Active = true
    else script.Parent.Text = 'Incorrect'
        wait(2)
        script.Parent.Text = 'Try Again'
    end
end

ok so I have a locked gui(admin panel) that when it puts a password in it should open the admin frame it makes it visible but the admin frame is not showing do I have a problem in my code? I also have a Rainbow script that Makes the border color change colors

function zigzag(X) return math.acos(math.cos(X*math.pi))/math.pi end

counter = 0

while wait(0.2)do
 script.Parent.BorderColor3 = Color3.fromHSV(zigzag(counter),1,1)

 counter = counter + 0.01
end