IntValue isn't setting when created?

Hello! I've been making an EXP system, with three values (1st value as Exp, 2nd one as Level and 3rd one as MaxExp) and it's not going very smoothly. Every time I test, the IntValue called "MaxExp" doesn't set to what I intended. Here's a snippit of my code of Level and MaxExp.

game.Players.PlayerAdded:Connect(function(plr)
    local leaderstats = Instance.new("IntValue",plr)
    leaderstats.Name = "leaderstats"
    local money = Instance.new("IntValue",leaderstats)
    money.Name = "Credits"
    local level = Instance.new("IntValue",leaderstats)
    level.Name = "Level"
    level.Value = 0
    local exp = Instance.new("IntValue",leaderstats)
    exp.Name = "Experience"
    local maxExp = Instance.new("IntValue",leaderstats)
    maxExp.Name = "MaxExp"
    maxExp.Value = 100 -- Not setting
end)

Any help please?

P.S, I'm new to the forum, this is my first post.