Click detector local event not running?

I am trying to make it some when you hover over a part it's bilboard gui highlight (by setting text stroke transparency = 0). But when I did

local ts = game:GetService("TweenService")

local linear_bi = TweenInfo.new(1, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut)

script.Parent.MouseHoverEnter:Connect(function(plr)
    local tween = ts:Create(script.Parent.Parent.BeforeHead.TextLabel, linear_bi, {
        TextStrokeTransparency = 0
    })
    tween:Play()
end)

script.Parent.MouseHoverLeave:Connect(function(plr)
    local tween = ts:Create(script.Parent.Parent.BeforeHead.TextLabel, linear_bi, {
        TextStrokeTransparency = 1
    })
    tween:Play()
end)

Then I looked for other questions on here and got the idea of using RemoteEvent on the server and firing the client. However when I did this it didn't work. SERVER

script.Parent.MouseClick:Connect(function()
    script.Parent.Parent.Parent.Health.Value = script.Parent.Parent.Parent.Health.Value - 1
end)

script.Parent.MouseHoverEnter:Connect(function(plr)
    script.Parent.Enter:FireClient(plr)
end)

script.Parent.MouseHoverLeave:Connect(function(plr)
    script.Parent.Leave:FireClient(plr)
end)

CLIENT

local ts = game:GetService("TweenService")

local linear_bi = TweenInfo.new(1, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut)

script.Parent.Enter.OnClientEvent:Connect(function(plr)
    print("Enter CLIENT")
    local tween = ts:Create(script.Parent.Parent.BeforeHead.TextLabel, linear_bi, {
        TextStrokeTransparency = 0
    })
    tween:Play()
end)

script.Parent.Leave.OnClientEvent:Connect(function(plr)
    local tween = ts:Create(script.Parent.Parent.BeforeHead.TextLabel, linear_bi, {
        TextStrokeTransparency = 1
    })
    tween:Play()
end)

Thank you!