StringValue doesn't change when the Reputation is changed?

I know this is probably really inefficient, but the StingValue doesn't change if the player's rep is changed.

    if player.leaderstats.Reputation.Value <= 99 then
        rank.Value = "Citizen"
    if player.leaderstats.Reputation.Value <= 100 then
        rank.Value = "Constable"
    if player.leaderstats.Reputation.Value <= 1000 then
        rank.Value = "Vigilante"
    if player.leaderstats.Reputation.Value <= 2500 then
        rank.Value = "Deputy"
    if player.leaderstats.Reputation.Value <= 5000 then
        rank.Value = "Lawman"
    if player.leaderstats.Reputation.Value <= 10000 then
        rank.Value = "Guardian"
    if player.leaderstats.Reputation.Value <= 15000 then
        rank.Value = "Noble"
    if player.leaderstats.Reputation.Value <= 25000 then
        rank.Value = "Hero"
    if player.leaderstats.Reputation.Value <= 100000 then
        rank.Value = "Omega Hero"
    if player.leaderstats.Reputation.Value <= 250000 then
        rank.Value = "Saint of Sanctuary"

    --NEGATIVE RANKS
    if player.leaderstats.Reputation.Value <= -4 then
        rank.Value = "Citizen"
    if player.leaderstats.Reputation.Value <= -5 then
        rank.Value = "Felon"
    if player.leaderstats.Reputation.Value <= -100 then
        rank.Value = "Thug"
    if player.leaderstats.Reputation.Value <= -1000 then
        rank.Value = "Outlaw"
    if player.leaderstats.Reputation.Value <= -2500 then
        rank.Value = "Bandit"
    if player.leaderstats.Reputation.Value <= -5000 then
        rank.Value = "Marauder"
    if player.leaderstats.Reputation.Value <= -10000 then
        rank.Value = "Villain"
    if player.leaderstats.Reputation.Value <= -15000 then
        rank.Value = "Hitman"
    if player.leaderstats.Reputation.Value <= -25000 then
        rank.Value = "Assassin"
    if player.leaderstats.Reputation.Value <= -100000 then
        rank.Value = "Serial Killer"
    if player.leaderstats.Reputation.Value <= -250000 then
        rank.Value = "Destroyer of Worlds"

Rank is a StingValue in Player. There is also a screen gui that shows the player's name and rank. The name works fine.

local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()

mouse.Move:connect(function()
    local target = mouse.Target.Parent
    local humanoid = target:FindFirstChild("Humanoid")
    if humanoid then
        script.Parent.Frame.plrName.Text = humanoid.Parent.Name
        script.Parent.Frame.plrRank.Text = target.leaderstats.Rank.Value
    else
        script.Parent.Frame.plrName.Text = ""
        script.Parent.Frame.plrRank.Text = ""
    end
end)